Field Lab Assignment
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The document summarizes rocks collected from New Melones Lake in California and describes their characteristics. It discusses the sedimentary rocks shale, sandstone, and quartzite; the igneous rocks granite and basalt; and notes the lake contains many historic and prehistoric archaeological sites from the Gold Rush era.
Field Lab Assignment
- 1. Field Lab - Part OneBy Ashley Nelson
- 2. Where did these rocks come from?The majority of my rocks came from New Melones Lake, Ca.
- 3. This is southwest of Angels Camp in the Sierra Nevada foothills.
- 4. The New Melones Lake contains more than 700 historic and prehistoric sites
- 5. This area was part of the gold rush in California.
- 6. Included are prehistoric habitation sites, bedrock mortars, petroglyphs, lithic quarries, mortuary caves, historic mines, rail and wagon roads, homesteads, mills, and town sites.ShaleSedimentary
- 9. Looks like it is mixed with clay or other mineral
- 10. Layers look like they were pressed together.GraniteIgneous
- 11. Found in the foothills of Clovis
- 12. Large crystals
- 14. Very hard and durableQuartziteMetamorphic
- 15. Created when heat and pressure are applied to sandstone
- 16. Looks like it was melted and pressed together
- 17. Some parts very smooth
- 18. Some parts very rough
- 19. Small crystals make the rock sparkleBasaltIgneous
- 20. Grey
- 21. Has another mineral mixed with it
- 22. Some parts are shiny
- 24. No texture or layeringSandstoneSedimentary
- 26. Dull finish
- 28. No layering
- 29. Looks like the grains were cemented togetherField Lab – Part TwoBy Ashley Nelson
- 30. This Fault was found in the Sierra Nevada Mountains
- 31. Weathering ProcessesThis picture shows chemical weathering because of the oxidation that caused the rust.The flat part of the table top mountains near Millerton Lake, CA shows weathering caused by erosion.
- 32. Mass Wasting and ErosionThis picture shows ripple marks caused by wind erosion.This is an example of mass wasting in Millerton Lake, CA.
- 33. Sedimentary EnvironmentsMarine (Millerton Lake, CA)Continental (Mojave Desert, CA)Transitional (Near Millerton Lake, CA)
- 34. Practical Uses for GeologyThe Friant Dam in Friant, CA (Millerton Lake)