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Rocks (geology)

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Neny Astria

There are three main types of rocks: sedimentary, igneous, and metamorphic. Sedimentary rocks form from the accumulation of sediments and include clastic, chemical, and organic rocks. Metamorphic rocks have been altered by heat, pressure, and chemical processes underground, changing their composition and texture. Igneous rocks form from the solidification of molten rock material and include intrusive rocks, which solidify below ground, and extrusive rocks at or above the surface.

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Rocks (geology)
are made up of different types of minerals There are three main groups of rocks these are sedimentary, igneous and metamorphic.
Sedimentary rocks are formed by the accumulation of sediments. There are three basic types of sedimentary rocks: 1) clastic sedimentary rocks such as breccia, conglomerate, sandstone and shale, that are formed from mechanical weathering debris; 2) chemical sedimentary rocks such as rock salt and some limestones, that form when dissolved materials precipitate from solution; 3) organic sedimentary rocks such as coal and some limestones which form from the accumulation of plant or animal debris.
Rocks (geology)
Metamorphic rocks have been modified by heat, pressure and chemical process usually while buried deep below Earth's surface. Exposure to these extreme conditions has altered the mineralogy, texture and chemical composition of the rocks. There are two basic types of metamorphic rocks: 1) foliated metamorphic rocks such as gneiss, phyllite, schist and slate which have a layered or banded appearance that is produced by exposure to heat and directed pressure; 2) non-foliated metamorphic rocks such as marble and quartzite which do not have a layered or banded appearance.
Rocks (geology)
Igneous rocks are formed from the solidification of molten rock material. There are two basic types: 1) intrusive igneous rocks such as diorite, gabbro, granite and pegmatite that solidify below Earth's surface; 2) extrusive igneous rocks such as andesite, basalt, obsidian, pumice, rhyolite and scoria that solidify on or above Earth's surface.
Rocks (geology)

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Rocks (geology)

  • 2. are made up of different types of minerals There are three main groups of rocks these are sedimentary, igneous and metamorphic.
  • 3. Sedimentary rocks are formed by the accumulation of sediments. There are three basic types of sedimentary rocks: 1) clastic sedimentary rocks such as breccia, conglomerate, sandstone and shale, that are formed from mechanical weathering debris; 2) chemical sedimentary rocks such as rock salt and some limestones, that form when dissolved materials precipitate from solution; 3) organic sedimentary rocks such as coal and some limestones which form from the accumulation of plant or animal debris.
  • 5. Metamorphic rocks have been modified by heat, pressure and chemical process usually while buried deep below Earth's surface. Exposure to these extreme conditions has altered the mineralogy, texture and chemical composition of the rocks. There are two basic types of metamorphic rocks: 1) foliated metamorphic rocks such as gneiss, phyllite, schist and slate which have a layered or banded appearance that is produced by exposure to heat and directed pressure; 2) non-foliated metamorphic rocks such as marble and quartzite which do not have a layered or banded appearance.
  • 7. Igneous rocks are formed from the solidification of molten rock material. There are two basic types: 1) intrusive igneous rocks such as diorite, gabbro, granite and pegmatite that solidify below Earth's surface; 2) extrusive igneous rocks such as andesite, basalt, obsidian, pumice, rhyolite and scoria that solidify on or above Earth's surface.