EESA06H3 Lecture Notes - Lecture 5: Schist, Protolith, Graded Bedding
Document Summary
Midterm sat, feb 16; format: multiple choice, short answer chosen from a. Sedimentary rocks come from worn down bits of other rocks. Sediments come from the wearing down of other rocks. The sediments/ions have to be deposited and collected together somewhere. Limestone is a sedimentary rock that is often formed at coral reefs. Compaction-> sediment piling on top of one another so that it becomes compacted. Cementation-> something sticky such as silica and calcite cements the grains together. Turning a non-rock into a rock is lithification. Anywhere from the deepest water areas to the top of mountains can be depositional areas for sedimentary rocks. Rock made from sediments on a beach would most likely be sandstone. Clastic means broken; broken up bits of other rocks (sands, silts, clays, In deeper water the sediments are very small pebbles) May also be chemical and biological sedimentary rocks. You can form limestone from old coral reefs; biological/biochemical sedimentary rocks.
