Lab 03_Sedimentary Rocks

Lab 03_Sedimentary Rocks - Lab 3 Sedimentary Rocks Lab...

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Lab 3 Sedimentary Rocks Lab Sediments : loose grains and chemical residues of Earth materials (includes rock fragments, mineral grains, parts of plants or animals and rust). All have a source and origin. Sedimentary rocks are made of compacted/compressed/hardened sediments . Sediments form from: - Biochemical processes of plants and animals - Chemical weathering : decomposition or dissolution of Earth materials. Feldspar and mica minerals decompose to clay minerals - Physical (mechanical) weathering : crushing, cracking, abrasion, scratching or other physical disintegration of Earth materials. Big rocks are broken/disintegrated into broken pieces named clasts . This is how logs are reduced to peat and how big rocks in a stream are abraded over time into smaller rocks, pebbles and sand grains carried in the water. Sediments can be: A) loose grains of broken rock, mineral, shell, or plant material B) chemical residues of rocks, minerals, plants C) aqueous solutions of water and other chemicals formed by dissolution and decay of rocky or organic materials. Formation of Sedimentary Rocks
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This note was uploaded on 10/26/2008 for the course GEOL 101 taught by Professor Knapp during the Fall '08 term at South Carolina.

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Lab 03_Sedimentary Rocks - Lab 3 Sedimentary Rocks Lab...

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