�ݺ�ߣshows by User: nikhilsherekar

�ݺ�ߣshows by User: nikhilsherekar / http://www.slideshare.net/images/logo.gif �ݺ�ߣshows by User: nikhilsherekar / Mon, 24 Aug 2020 09:14:56 GMT �ݺ�ߣShare feed for �ݺ�ߣshows by User: nikhilsherekar Bhu 19 pet_solved_3 /slideshow/bhu-19-petsolved3/238187495 bhu19petsolved3-200824091457
BHU PET 2019 M.Sc Geology Solved question paper part 3]]>
BHU PET 2019 M.Sc Geology Solved question paper part 3]]> Mon, 24 Aug 2020 09:14:56 GMT /slideshow/bhu-19-petsolved3/238187495 nikhilsherekar@slideshare.net(nikhilsherekar) Bhu 19 pet_solved_3 nikhilsherekar BHU PET 2019 M.Sc Geology Solved question paper part 3 <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/bhu19petsolved3-200824091457-thumbnail.jpg?width=120&height=120&fit=bounds" /> BHU PET 2019 M.Sc Geology Solved question paper part 3

Bhu 19 pet_solved_3 from Nikhil Sherekar

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0 Bhu 19 pet_solved_2 /nikhilsherekar/bhu-19-petsolved2 bhu19petsolved2-200824091443
BHU PET 2019 M.Sc Geology Solved question paper part 2]]>
BHU PET 2019 M.Sc Geology Solved question paper part 2]]> Mon, 24 Aug 2020 09:14:43 GMT /nikhilsherekar/bhu-19-petsolved2 nikhilsherekar@slideshare.net(nikhilsherekar) Bhu 19 pet_solved_2 nikhilsherekar BHU PET 2019 M.Sc Geology Solved question paper part 2 <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/bhu19petsolved2-200824091443-thumbnail.jpg?width=120&height=120&fit=bounds" /> BHU PET 2019 M.Sc Geology Solved question paper part 2

Bhu 19 pet_solved_2 from Nikhil Sherekar

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0 Bhu 19 pet_solved_1 /slideshow/bhu-19-petsolved1-238187417/238187417 bhu19petsolved1-200824091150
BHU PET 2019 M.Sc Geology Solved question paper part 1]]>
BHU PET 2019 M.Sc Geology Solved question paper part 1]]> Mon, 24 Aug 2020 09:11:50 GMT /slideshow/bhu-19-petsolved1-238187417/238187417 nikhilsherekar@slideshare.net(nikhilsherekar) Bhu 19 pet_solved_1 nikhilsherekar BHU PET 2019 M.Sc Geology Solved question paper part 1 <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/bhu19petsolved1-200824091150-thumbnail.jpg?width=120&height=120&fit=bounds" /> BHU PET 2019 M.Sc Geology Solved question paper part 1

Bhu 19 pet_solved_1 from Nikhil Sherekar

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0 Guidelines for lithological, structural and geomorphic interpretation /slideshow/guidelines-for-lithological-structural-and-geomorphic-interpretation/232569867 guidelinesforlithologicalstructuralandgeomorphicinterpretation-200424103349
Guidelines for lithological, structural and geomorphic interpretation]]>
Guidelines for lithological, structural and geomorphic interpretation]]> Fri, 24 Apr 2020 10:33:49 GMT /slideshow/guidelines-for-lithological-structural-and-geomorphic-interpretation/232569867 nikhilsherekar@slideshare.net(nikhilsherekar) Guidelines for lithological, structural and geomorphic interpretation nikhilsherekar Guidelines for lithological, structural and geomorphic interpretation <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/guidelinesforlithologicalstructuralandgeomorphicinterpretation-200424103349-thumbnail.jpg?width=120&height=120&fit=bounds" /> Guidelines for lithological, structural and geomorphic interpretation

Guidelines for lithological, structural and geomorphic interpretation from Nikhil Sherekar

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0 Fundmetal concepts of geomorphology /slideshow/fundmetal-concepts-of-geomorphology/231567294 fundmetlconceptsofgeomorphology-200407124706
Concept 1. The same physical processes and laws that operate today operated throughout geologic time, although not necessarily always with the same intensity as now. Concept 2. Geologic structure is a dominant control factor in the evolution of land forms and is reflected in them. ]]>
Concept 1. The same physical processes and laws that operate today operated throughout geologic time, although not necessarily always with the same intensity as now. Concept 2. Geologic structure is a dominant control factor in the evolution of land forms and is reflected in them. ]]> Tue, 07 Apr 2020 12:47:06 GMT /slideshow/fundmetal-concepts-of-geomorphology/231567294 nikhilsherekar@slideshare.net(nikhilsherekar) Fundmetal concepts of geomorphology nikhilsherekar Concept 1. The same physical processes and laws that operate today operated throughout geologic time, although not necessarily always with the same intensity as now. Concept 2. Geologic structure is a dominant control factor in the evolution of land forms and is reflected in them. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/fundmetlconceptsofgeomorphology-200407124706-thumbnail.jpg?width=120&height=120&fit=bounds" /> Concept 1. The same physical processes and laws that operate today operated throughout geologic time, although not necessarily always with the same intensity as now. Concept 2. Geologic structure is a dominant control factor in the evolution of land forms and is reflected in them.

Fundmetal concepts of geomorphology from Nikhil Sherekar

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0 Tools of geomorphologist /slideshow/tools-of-geomorphologist/231566856 toolsofgeomorphologist-200407123132
Nothing can entirely replace careful field observations in the study of a geomorphic problem, but numerous aid can add to their effectiveness s, reduce the amount of field work for many problems, make possible a more effective planning of the field program, and add support to the conclusions drawn. These aids are what may be called the "tools" of the geomorphologist, although their use is by no means restricted to him. Topographic maps, geologic maps, block diagrams, aerial photographs, soil map, and climatic data are the most commonly used tools in geomorphic studies.]]>
Nothing can entirely replace careful field observations in the study of a geomorphic problem, but numerous aid can add to their effectiveness s, reduce the amount of field work for many problems, make possible a more effective planning of the field program, and add support to the conclusions drawn. These aids are what may be called the "tools" of the geomorphologist, although their use is by no means restricted to him. Topographic maps, geologic maps, block diagrams, aerial photographs, soil map, and climatic data are the most commonly used tools in geomorphic studies.]]> Tue, 07 Apr 2020 12:31:32 GMT /slideshow/tools-of-geomorphologist/231566856 nikhilsherekar@slideshare.net(nikhilsherekar) Tools of geomorphologist nikhilsherekar Nothing can entirely replace careful field observations in the study of a geomorphic problem, but numerous aid can add to their effectiveness s, reduce the amount of field work for many problems, make possible a more effective planning of the field program, and add support to the conclusions drawn. These aids are what may be called the "tools" of the geomorphologist, although their use is by no means restricted to him. Topographic maps, geologic maps, block diagrams, aerial photographs, soil map, and climatic data are the most commonly used tools in geomorphic studies. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/toolsofgeomorphologist-200407123132-thumbnail.jpg?width=120&height=120&fit=bounds" /> Nothing can entirely replace careful field observations in the study of a geomorphic problem, but numerous aid can add to their effectiveness s, reduce the amount of field work for many problems, make possible a more effective planning of the field program, and add support to the conclusions drawn. These aids are what may be called the "tools" of the geomorphologist, although their use is by no means restricted to him. Topographic maps, geologic maps, block diagrams, aerial photographs, soil map, and climatic data are the most commonly used tools in geomorphic studies.

Tools of geomorphologist from Nikhil Sherekar

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0 Mica /slideshow/mica-195353816/195353816 mica-191120031005
Name: Probably used in the mineralogical sense by 1706 and originally "smicka" and from the Latin micare - to flash or glisten in allusion to the material's appearance. Isinglass predates the use of mica as a mineral term and known from at least 1535, but isinglass also referred to the matter from the sturgeon fish that also had pearly flakes from the scales. Mica is widely distributed and occurs in igneous, metamorphic and sedimentary regimes. Mica group represents 34 phyllosilicate minerals that exhibits a layered or platy structure. Commercially important mica minerals are muscovite (potash or white mica) and phlogopite (magnesium or amber mica). Granitic pegmatites are the source of muscovite sheet, while phlogopite is found in areas of metamorphosed sedimentary rocks into which pegmatite rich granite rocks have been intruded. It possesses highly perfect basal cleavage due to which it can easily and accurately split into very thin sheets or films of any specified thickness. It has a unique combination of elasticity, toughness, flexibility and transparency. It possesses resistance to heat and sudden change in temperature and high dielectric strength. It is chemically inert, stable and does not absorb water. ]]>
Name: Probably used in the mineralogical sense by 1706 and originally "smicka" and from the Latin micare - to flash or glisten in allusion to the material's appearance. Isinglass predates the use of mica as a mineral term and known from at least 1535, but isinglass also referred to the matter from the sturgeon fish that also had pearly flakes from the scales. Mica is widely distributed and occurs in igneous, metamorphic and sedimentary regimes. Mica group represents 34 phyllosilicate minerals that exhibits a layered or platy structure. Commercially important mica minerals are muscovite (potash or white mica) and phlogopite (magnesium or amber mica). Granitic pegmatites are the source of muscovite sheet, while phlogopite is found in areas of metamorphosed sedimentary rocks into which pegmatite rich granite rocks have been intruded. It possesses highly perfect basal cleavage due to which it can easily and accurately split into very thin sheets or films of any specified thickness. It has a unique combination of elasticity, toughness, flexibility and transparency. It possesses resistance to heat and sudden change in temperature and high dielectric strength. It is chemically inert, stable and does not absorb water. ]]> Wed, 20 Nov 2019 03:10:05 GMT /slideshow/mica-195353816/195353816 nikhilsherekar@slideshare.net(nikhilsherekar) Mica nikhilsherekar Name: Probably used in the mineralogical sense by 1706 and originally "smicka" and from the Latin micare - to flash or glisten in allusion to the material's appearance. Isinglass predates the use of mica as a mineral term and known from at least 1535, but isinglass also referred to the matter from the sturgeon fish that also had pearly flakes from the scales. Mica is widely distributed and occurs in igneous, metamorphic and sedimentary regimes. Mica group represents 34 phyllosilicate minerals that exhibits a layered or platy structure. Commercially important mica minerals are muscovite (potash or white mica) and phlogopite (magnesium or amber mica). Granitic pegmatites are the source of muscovite sheet, while phlogopite is found in areas of metamorphosed sedimentary rocks into which pegmatite rich granite rocks have been intruded. It possesses highly perfect basal cleavage due to which it can easily and accurately split into very thin sheets or films of any specified thickness. It has a unique combination of elasticity, toughness, flexibility and transparency. It possesses resistance to heat and sudden change in temperature and high dielectric strength. It is chemically inert, stable and does not absorb water. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/mica-191120031005-thumbnail.jpg?width=120&height=120&fit=bounds" /> Name: Probably used in the mineralogical sense by 1706 and originally "smicka" and from the Latin micare - to flash or glisten in allusion to the material's appearance. Isinglass predates the use of mica as a mineral term and known from at least 1535, but isinglass also referred to the matter from the sturgeon fish that also had pearly flakes from the scales. Mica is widely distributed and occurs in igneous, metamorphic and sedimentary regimes. Mica group represents 34 phyllosilicate minerals that exhibits a layered or platy structure. Commercially important mica minerals are muscovite (potash or white mica) and phlogopite (magnesium or amber mica). Granitic pegmatites are the source of muscovite sheet, while phlogopite is found in areas of metamorphosed sedimentary rocks into which pegmatite rich granite rocks have been intruded. It possesses highly perfect basal cleavage due to which it can easily and accurately split into very thin sheets or films of any specified thickness. It has a unique combination of elasticity, toughness, flexibility and transparency. It possesses resistance to heat and sudden change in temperature and high dielectric strength. It is chemically inert, stable and does not absorb water.

Mica from Nikhil Sherekar

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0 Iron /slideshow/iron-195348756/195348756 iron-191120025545
Iron is the most vital metal in human use. It constitutes 5.05% of the crust material and holds third position in abundance after silicon and aluminium. It is rarely found in native condition except in meteorites and some eruptive rocks. It enters into large number of rocks forming silicates and is widely available as oxides. The mineral containing iron must be mineable at profit in order to be called an 'iron-ore.' The total world production of iron-ore in 1990 was about 1,008 million tonnes (Economic Geology - Umeshwar Prasad) to which India's contribution was about 55.5 million tonnes (contributing 5.5%) with 6th position in the world production. Boiling Point‎: ‎5182°F (2862°C) Atomic Symbol‎: ‎Fe Melting Point‎: ‎2800°F (1538°C) Atomic Number‎: ‎26 ]]>
Iron is the most vital metal in human use. It constitutes 5.05% of the crust material and holds third position in abundance after silicon and aluminium. It is rarely found in native condition except in meteorites and some eruptive rocks. It enters into large number of rocks forming silicates and is widely available as oxides. The mineral containing iron must be mineable at profit in order to be called an 'iron-ore.' The total world production of iron-ore in 1990 was about 1,008 million tonnes (Economic Geology - Umeshwar Prasad) to which India's contribution was about 55.5 million tonnes (contributing 5.5%) with 6th position in the world production. Boiling Point‎: ‎5182°F (2862°C) Atomic Symbol‎: ‎Fe Melting Point‎: ‎2800°F (1538°C) Atomic Number‎: ‎26 ]]> Wed, 20 Nov 2019 02:55:45 GMT /slideshow/iron-195348756/195348756 nikhilsherekar@slideshare.net(nikhilsherekar) Iron nikhilsherekar Iron is the most vital metal in human use. It constitutes 5.05% of the crust material and holds third position in abundance after silicon and aluminium. It is rarely found in native condition except in meteorites and some eruptive rocks. It enters into large number of rocks forming silicates and is widely available as oxides. The mineral containing iron must be mineable at profit in order to be called an 'iron-ore.' The total world production of iron-ore in 1990 was about 1,008 million tonnes (Economic Geology - Umeshwar Prasad) to which India's contribution was about 55.5 million tonnes (contributing 5.5%) with 6th position in the world production. Boiling Point‎: ‎5182°F (2862°C) Atomic Symbol‎: ‎Fe Melting Point‎: ‎2800°F (1538°C) Atomic Number‎: ‎26 <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/iron-191120025545-thumbnail.jpg?width=120&height=120&fit=bounds" /> Iron is the most vital metal in human use. It constitutes 5.05% of the crust material and holds third position in abundance after silicon and aluminium. It is rarely found in native condition except in meteorites and some eruptive rocks. It enters into large number of rocks forming silicates and is widely available as oxides. The mineral containing iron must be mineable at profit in order to be called an 'iron-ore.' The total world production of iron-ore in 1990 was about 1,008 million tonnes (Economic Geology - Umeshwar Prasad) to which India's contribution was about 55.5 million tonnes (contributing 5.5%) with 6th position in the world production. Boiling Point‎: ‎5182°F (2862°C) Atomic Symbol‎: ‎Fe Melting Point‎: ‎2800°F (1538°C) Atomic Number‎: ‎26

Iron from Nikhil Sherekar

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0 Geological Thermometers /slideshow/geological-thermometers/193821756 geologicalthermometers-191115042834
GEOLOGICAL THERMOMETERS DEFINITION AND CLASSIFICATION Proper understanding of origin of mineral deposits and their classification requires the knowledge of formation-temperatures of these deposits. Certain minerals, present over there, give information’s with regard to temperatures of their formations and of the enclosing deposits and they are known as geological thermometers. These geological thermometers may be classed chiefly into the following groups based on their preciseness: 1. The thermometers that record fairly accurately the specific temperature condition of formation of deposits. 2. The thermometers that provide an upper or a lower temperature, above or below which the deposits do not form 3. The thermometers that provide a range of temperature within which the deposits form; and 4. The thermometers that serve as rough indications of temperatures of formation of mineral deposits. The presence of two or more of less precise geological thermometers in a deposit narrows the range of temperature of formation for the deposits ]]>
GEOLOGICAL THERMOMETERS DEFINITION AND CLASSIFICATION Proper understanding of origin of mineral deposits and their classification requires the knowledge of formation-temperatures of these deposits. Certain minerals, present over there, give information’s with regard to temperatures of their formations and of the enclosing deposits and they are known as geological thermometers. These geological thermometers may be classed chiefly into the following groups based on their preciseness: 1. The thermometers that record fairly accurately the specific temperature condition of formation of deposits. 2. The thermometers that provide an upper or a lower temperature, above or below which the deposits do not form 3. The thermometers that provide a range of temperature within which the deposits form; and 4. The thermometers that serve as rough indications of temperatures of formation of mineral deposits. The presence of two or more of less precise geological thermometers in a deposit narrows the range of temperature of formation for the deposits ]]> Fri, 15 Nov 2019 04:28:34 GMT /slideshow/geological-thermometers/193821756 nikhilsherekar@slideshare.net(nikhilsherekar) Geological Thermometers nikhilsherekar GEOLOGICAL THERMOMETERS DEFINITION AND CLASSIFICATION Proper understanding of origin of mineral deposits and their classification requires the knowledge of formation-temperatures of these deposits. Certain minerals, present over there, give information’s with regard to temperatures of their formations and of the enclosing deposits and they are known as geological thermometers. These geological thermometers may be classed chiefly into the following groups based on their preciseness: 1. The thermometers that record fairly accurately the specific temperature condition of formation of deposits. 2. The thermometers that provide an upper or a lower temperature, above or below which the deposits do not form 3. The thermometers that provide a range of temperature within which the deposits form; and 4. The thermometers that serve as rough indications of temperatures of formation of mineral deposits. The presence of two or more of less precise geological thermometers in a deposit narrows the range of temperature of formation for the deposits <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/geologicalthermometers-191115042834-thumbnail.jpg?width=120&height=120&fit=bounds" /> GEOLOGICAL THERMOMETERS DEFINITION AND CLASSIFICATION Proper understanding of origin of mineral deposits and their classification requires the knowledge of formation-temperatures of these deposits. Certain minerals, present over there, give information’s with regard to temperatures of their formations and of the enclosing deposits and they are known as geological thermometers. These geological thermometers may be classed chiefly into the following groups based on their preciseness: 1. The thermometers that record fairly accurately the specific temperature condition of formation of deposits. 2. The thermometers that provide an upper or a lower temperature, above or below which the deposits do not form 3. The thermometers that provide a range of temperature within which the deposits form; and 4. The thermometers that serve as rough indications of temperatures of formation of mineral deposits. The presence of two or more of less precise geological thermometers in a deposit narrows the range of temperature of formation for the deposits

Geological Thermometers from Nikhil Sherekar

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0 Asbestos /slideshow/asbestos-193818084/193818084 asbestos-191115041931
silicate mineral. The physical properties, besides asbestos is a group of six naturally occurring fibrous character, such as, fineness, flexibility, tensile strength & length of fibres, infusibility, low heat conductivity and high resistance to electricity & sound as also to corrosion by acids, make asbestos commercially important. Commercial asbestos is classified into two main mineralogical groups: serpentine asbestos or chrysotile asbestos and amphibole asbestos. The latter includes asbestos minerals, such as, tremolite, actinolite, anthophyllite, amosite and crocidolite. Commercially, chrysotile asbestos is far superior in physical properties and hence more valuable than amphibole asbestos. India's asbestos requirement is mainly met through imports from Russia, Kazakhstan, Brazil and China. India uses an estimated 350,000 tons of asbestos annually, trailing behind China. Asbestos – white to greenish and brownish in color with fibrous form. H – 2.5-3, classifies into Long fibre and short fibre. ]]>
silicate mineral. The physical properties, besides asbestos is a group of six naturally occurring fibrous character, such as, fineness, flexibility, tensile strength & length of fibres, infusibility, low heat conductivity and high resistance to electricity & sound as also to corrosion by acids, make asbestos commercially important. Commercial asbestos is classified into two main mineralogical groups: serpentine asbestos or chrysotile asbestos and amphibole asbestos. The latter includes asbestos minerals, such as, tremolite, actinolite, anthophyllite, amosite and crocidolite. Commercially, chrysotile asbestos is far superior in physical properties and hence more valuable than amphibole asbestos. India's asbestos requirement is mainly met through imports from Russia, Kazakhstan, Brazil and China. India uses an estimated 350,000 tons of asbestos annually, trailing behind China. Asbestos – white to greenish and brownish in color with fibrous form. H – 2.5-3, classifies into Long fibre and short fibre. ]]> Fri, 15 Nov 2019 04:19:31 GMT /slideshow/asbestos-193818084/193818084 nikhilsherekar@slideshare.net(nikhilsherekar) Asbestos nikhilsherekar silicate mineral. The physical properties, besides asbestos is a group of six naturally occurring fibrous character, such as, fineness, flexibility, tensile strength & length of fibres, infusibility, low heat conductivity and high resistance to electricity & sound as also to corrosion by acids, make asbestos commercially important. Commercial asbestos is classified into two main mineralogical groups: serpentine asbestos or chrysotile asbestos and amphibole asbestos. The latter includes asbestos minerals, such as, tremolite, actinolite, anthophyllite, amosite and crocidolite. Commercially, chrysotile asbestos is far superior in physical properties and hence more valuable than amphibole asbestos. India's asbestos requirement is mainly met through imports from Russia, Kazakhstan, Brazil and China. India uses an estimated 350,000 tons of asbestos annually, trailing behind China. Asbestos – white to greenish and brownish in color with fibrous form. H – 2.5-3, classifies into Long fibre and short fibre. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/asbestos-191115041931-thumbnail.jpg?width=120&height=120&fit=bounds" /> silicate mineral. The physical properties, besides asbestos is a group of six naturally occurring fibrous character, such as, fineness, flexibility, tensile strength & length of fibres, infusibility, low heat conductivity and high resistance to electricity & sound as also to corrosion by acids, make asbestos commercially important. Commercial asbestos is classified into two main mineralogical groups: serpentine asbestos or chrysotile asbestos and amphibole asbestos. The latter includes asbestos minerals, such as, tremolite, actinolite, anthophyllite, amosite and crocidolite. Commercially, chrysotile asbestos is far superior in physical properties and hence more valuable than amphibole asbestos. India's asbestos requirement is mainly met through imports from Russia, Kazakhstan, Brazil and China. India uses an estimated 350,000 tons of asbestos annually, trailing behind China. Asbestos – white to greenish and brownish in color with fibrous form. H – 2.5-3, classifies into Long fibre and short fibre.

Asbestos from Nikhil Sherekar

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0 Metallogenic Epoch and Province /slideshow/metallogenic-epoch-and-province/193813703 metallogenicep-191115040727
Metallogenic Epoch and Province  Metallogenetic Epochs Metallogenetic epochs, as defined above, are specific periods characterised by formation of large number of mineral deposits. It does not mean that all the mineral deposits formed during a definite metallogenetic epochs. In India the chief metallogenetic epochs were: 1. Precambrian 2. Late Palaeozoic 3. Late Mesozoic to Early Tertiary ]]>
Metallogenic Epoch and Province  Metallogenetic Epochs Metallogenetic epochs, as defined above, are specific periods characterised by formation of large number of mineral deposits. It does not mean that all the mineral deposits formed during a definite metallogenetic epochs. In India the chief metallogenetic epochs were: 1. Precambrian 2. Late Palaeozoic 3. Late Mesozoic to Early Tertiary ]]> Fri, 15 Nov 2019 04:07:27 GMT /slideshow/metallogenic-epoch-and-province/193813703 nikhilsherekar@slideshare.net(nikhilsherekar) Metallogenic Epoch and Province nikhilsherekar Metallogenic Epoch and Province  Metallogenetic Epochs Metallogenetic epochs, as defined above, are specific periods characterised by formation of large number of mineral deposits. It does not mean that all the mineral deposits formed during a definite metallogenetic epochs. In India the chief metallogenetic epochs were: 1. Precambrian 2. Late Palaeozoic 3. Late Mesozoic to Early Tertiary <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/metallogenicep-191115040727-thumbnail.jpg?width=120&height=120&fit=bounds" /> Metallogenic Epoch and Province  Metallogenetic Epochs Metallogenetic epochs, as defined above, are specific periods characterised by formation of large number of mineral deposits. It does not mean that all the mineral deposits formed during a definite metallogenetic epochs. In India the chief metallogenetic epochs were: 1. Precambrian 2. Late Palaeozoic 3. Late Mesozoic to Early Tertiary

Metallogenic Epoch and Province from Nikhil Sherekar

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0 Cephalopods (Palaentology Practical B.Sc Geology) /slideshow/cephalopods-palaentology-practical-bsc-geology/193801916 cephalopods-191115034023
Classification Kingdom Animalia Sub kingdom Invertibrata Phylum Mollusca Class Cephalopoda Order Nautiloidea Genus Nautilus Morphological characters –  Shell is Globular and involute coiling  Few whorls with large body chamber, Aperture is oval and rarely semilunar  Umbilicus may be occluded with callus.  Central siphuncle is present with septal neck-retrosiphonate.  Shows simple nauitiloid suture line, thin growth lines and simple ribs. Geological Age – Triassic to recent ]]>
Classification Kingdom Animalia Sub kingdom Invertibrata Phylum Mollusca Class Cephalopoda Order Nautiloidea Genus Nautilus Morphological characters –  Shell is Globular and involute coiling  Few whorls with large body chamber, Aperture is oval and rarely semilunar  Umbilicus may be occluded with callus.  Central siphuncle is present with septal neck-retrosiphonate.  Shows simple nauitiloid suture line, thin growth lines and simple ribs. Geological Age – Triassic to recent ]]> Fri, 15 Nov 2019 03:40:23 GMT /slideshow/cephalopods-palaentology-practical-bsc-geology/193801916 nikhilsherekar@slideshare.net(nikhilsherekar) Cephalopods (Palaentology Practical B.Sc Geology) nikhilsherekar Classification Kingdom Animalia Sub kingdom Invertibrata Phylum Mollusca Class Cephalopoda Order Nautiloidea Genus Nautilus Morphological characters –  Shell is Globular and involute coiling  Few whorls with large body chamber, Aperture is oval and rarely semilunar  Umbilicus may be occluded with callus.  Central siphuncle is present with septal neck-retrosiphonate.  Shows simple nauitiloid suture line, thin growth lines and simple ribs. Geological Age – Triassic to recent <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/cephalopods-191115034023-thumbnail.jpg?width=120&height=120&fit=bounds" /> Classification Kingdom Animalia Sub kingdom Invertibrata Phylum Mollusca Class Cephalopoda Order Nautiloidea Genus Nautilus Morphological characters –  Shell is Globular and involute coiling  Few whorls with large body chamber, Aperture is oval and rarely semilunar  Umbilicus may be occluded with callus.  Central siphuncle is present with septal neck-retrosiphonate.  Shows simple nauitiloid suture line, thin growth lines and simple ribs. Geological Age – Triassic to recent

Cephalopods (Palaentology Practical B.Sc Geology) from Nikhil Sherekar

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0 Deccan trap /slideshow/deccan-trap-193792122/193792122 deccantrap-191115031156
The term "trap" has been used in geology since 1785–95 for rock formations. It is derived from the Swedish word for stairs (trapp , trappa) and refers to the step-like hills forming the landscape of the region. The plateau: also called a high plain or tableland, is an area of highland, usually consisting of relatively flat terrain. A plateau is an elevated land. It is a flat-topped table standing above the surrounding area. A plateau may have one or more sides with steep slopes. LIP – Large Igneous provinces. (Province = Area / Region) DVP - The Deccan Volcanic Province is one of the Earth’s giant continental flood basalts and has a total exposed area of about half a million square kilometers in Maharashtra, Madhya Pradesh, Gujrat and some part of Andhra Pradesh. Deccan trap has maximum thickness 3400m in western ghat and its thickness goes decrease toward east side. At Amrakantat on east its thickness is just 160m. Geographical distribution is between latitudes 16° - 24° N and longitudes 70° - 77° E. ]]>
The term "trap" has been used in geology since 1785–95 for rock formations. It is derived from the Swedish word for stairs (trapp , trappa) and refers to the step-like hills forming the landscape of the region. The plateau: also called a high plain or tableland, is an area of highland, usually consisting of relatively flat terrain. A plateau is an elevated land. It is a flat-topped table standing above the surrounding area. A plateau may have one or more sides with steep slopes. LIP – Large Igneous provinces. (Province = Area / Region) DVP - The Deccan Volcanic Province is one of the Earth’s giant continental flood basalts and has a total exposed area of about half a million square kilometers in Maharashtra, Madhya Pradesh, Gujrat and some part of Andhra Pradesh. Deccan trap has maximum thickness 3400m in western ghat and its thickness goes decrease toward east side. At Amrakantat on east its thickness is just 160m. Geographical distribution is between latitudes 16° - 24° N and longitudes 70° - 77° E. ]]> Fri, 15 Nov 2019 03:11:56 GMT /slideshow/deccan-trap-193792122/193792122 nikhilsherekar@slideshare.net(nikhilsherekar) Deccan trap nikhilsherekar The term "trap" has been used in geology since 1785–95 for rock formations. It is derived from the Swedish word for stairs (trapp , trappa) and refers to the step-like hills forming the landscape of the region. The plateau: also called a high plain or tableland, is an area of highland, usually consisting of relatively flat terrain. A plateau is an elevated land. It is a flat-topped table standing above the surrounding area. A plateau may have one or more sides with steep slopes. LIP – Large Igneous provinces. (Province = Area / Region) DVP - The Deccan Volcanic Province is one of the Earth’s giant continental flood basalts and has a total exposed area of about half a million square kilometers in Maharashtra, Madhya Pradesh, Gujrat and some part of Andhra Pradesh. Deccan trap has maximum thickness 3400m in western ghat and its thickness goes decrease toward east side. At Amrakantat on east its thickness is just 160m. Geographical distribution is between latitudes 16° - 24° N and longitudes 70° - 77° E. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/deccantrap-191115031156-thumbnail.jpg?width=120&height=120&fit=bounds" /> The term "trap" has been used in geology since 1785–95 for rock formations. It is derived from the Swedish word for stairs (trapp , trappa) and refers to the step-like hills forming the landscape of the region. The plateau: also called a high plain or tableland, is an area of highland, usually consisting of relatively flat terrain. A plateau is an elevated land. It is a flat-topped table standing above the surrounding area. A plateau may have one or more sides with steep slopes. LIP – Large Igneous provinces. (Province = Area / Region) DVP - The Deccan Volcanic Province is one of the Earth’s giant continental flood basalts and has a total exposed area of about half a million square kilometers in Maharashtra, Madhya Pradesh, Gujrat and some part of Andhra Pradesh. Deccan trap has maximum thickness 3400m in western ghat and its thickness goes decrease toward east side. At Amrakantat on east its thickness is just 160m. Geographical distribution is between latitudes 16° - 24° N and longitudes 70° - 77° E.

Deccan trap from Nikhil Sherekar

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0 Space and time kindrets /slideshow/space-and-time-kindrets/193786997 spaceandtimekindrets-191115025855
THE DISTRIBUTION OF IGNEOUS ROCKS IN SPACE AND TIME CONSANGUINITY-The term consanguinity (Iddings) is used to indicate the fact that certain groups of igneous rocks, the members of which are associated in space and time, possess a community of character or family likeness which is expressed in their chemical, mineralogical, textural, and geological features. While in chemical composition consanguineous series or suites may range from acid to ultrabasic types, some mineral and chemical characters are constant, i.e. are common to practically all members; while other characters are serial, that is to say, they show regular variation throughout the series. Thus, in some suites, a constant character is oversaturation with silica, which causes free silica to appear in quite basic members. A serial character may be afforded by the regular variation of the alkalis, or of ferrous iron oxide and magnesia throughout the suite. Some series may be characterised throughout by a peculiar mineralogical feature, such as the occurrence of anorthoclase, as in certain Norwegian, East Mrican, and Antarctic suites. Consanguinity in an igneous series leads to the hypothesis that the assemblage has been derived by some process of differentiation from a common initial magma, from a number of closely related magmas.]]>
THE DISTRIBUTION OF IGNEOUS ROCKS IN SPACE AND TIME CONSANGUINITY-The term consanguinity (Iddings) is used to indicate the fact that certain groups of igneous rocks, the members of which are associated in space and time, possess a community of character or family likeness which is expressed in their chemical, mineralogical, textural, and geological features. While in chemical composition consanguineous series or suites may range from acid to ultrabasic types, some mineral and chemical characters are constant, i.e. are common to practically all members; while other characters are serial, that is to say, they show regular variation throughout the series. Thus, in some suites, a constant character is oversaturation with silica, which causes free silica to appear in quite basic members. A serial character may be afforded by the regular variation of the alkalis, or of ferrous iron oxide and magnesia throughout the suite. Some series may be characterised throughout by a peculiar mineralogical feature, such as the occurrence of anorthoclase, as in certain Norwegian, East Mrican, and Antarctic suites. Consanguinity in an igneous series leads to the hypothesis that the assemblage has been derived by some process of differentiation from a common initial magma, from a number of closely related magmas.]]> Fri, 15 Nov 2019 02:58:55 GMT /slideshow/space-and-time-kindrets/193786997 nikhilsherekar@slideshare.net(nikhilsherekar) Space and time kindrets nikhilsherekar THE DISTRIBUTION OF IGNEOUS ROCKS IN SPACE AND TIME CONSANGUINITY-The term consanguinity (Iddings) is used to indicate the fact that certain groups of igneous rocks, the members of which are associated in space and time, possess a community of character or family likeness which is expressed in their chemical, mineralogical, textural, and geological features. While in chemical composition consanguineous series or suites may range from acid to ultrabasic types, some mineral and chemical characters are constant, i.e. are common to practically all members; while other characters are serial, that is to say, they show regular variation throughout the series. Thus, in some suites, a constant character is oversaturation with silica, which causes free silica to appear in quite basic members. A serial character may be afforded by the regular variation of the alkalis, or of ferrous iron oxide and magnesia throughout the suite. Some series may be characterised throughout by a peculiar mineralogical feature, such as the occurrence of anorthoclase, as in certain Norwegian, East Mrican, and Antarctic suites. Consanguinity in an igneous series leads to the hypothesis that the assemblage has been derived by some process of differentiation from a common initial magma, from a number of closely related magmas. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/spaceandtimekindrets-191115025855-thumbnail.jpg?width=120&height=120&fit=bounds" /> THE DISTRIBUTION OF IGNEOUS ROCKS IN SPACE AND TIME CONSANGUINITY-The term consanguinity (Iddings) is used to indicate the fact that certain groups of igneous rocks, the members of which are associated in space and time, possess a community of character or family likeness which is expressed in their chemical, mineralogical, textural, and geological features. While in chemical composition consanguineous series or suites may range from acid to ultrabasic types, some mineral and chemical characters are constant, i.e. are common to practically all members; while other characters are serial, that is to say, they show regular variation throughout the series. Thus, in some suites, a constant character is oversaturation with silica, which causes free silica to appear in quite basic members. A serial character may be afforded by the regular variation of the alkalis, or of ferrous iron oxide and magnesia throughout the suite. Some series may be characterised throughout by a peculiar mineralogical feature, such as the occurrence of anorthoclase, as in certain Norwegian, East Mrican, and Antarctic suites. Consanguinity in an igneous series leads to the hypothesis that the assemblage has been derived by some process of differentiation from a common initial magma, from a number of closely related magmas.

Space and time kindrets from Nikhil Sherekar

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