EAR 105 Lecture Notes - Lecture 10: Lithification, Clastic Rock, Breccia
22 Feb 2018
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Date back to 1564 in scotland: all olympic rocks come from the same mile-long island. Clastic anything fragments/clasts that are cemented together: clasts are from previous existing rocks, describe the process of creating a clastic sedimentary rock (for ex: sandstone), first process: weathering. Weathering is the process of breaking down rocks. Two types: physical and chemical: second process: erosion. We can do this using gravity, water, ice, and/or wind. (cid:862)agents of erosion(cid:863: third process: transportation. Clasts are further reduced in size, they might be dissolved, and they are sorted. Through water, ice, or wind: fourth process: deposition. Sediments are deposited according to energy (size) Ions that are separated create minerals: fifth and final step: lithification. The process of transforming loose sediment into solid rock. Detrital sedimentary rocks can be classified by size and shape of grains. If you have rounded pebbles that are glued together and you can see them, its conglomerate. If the rocks are nit rounded, its breccia.
