Geology for the CSET Subtest 2 Science Section

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organic sedimentary rock is coal, which is burned to produce steam for electricity.

There is also a relationship between the presence of organic carbon in sediments and a

particular clay mineral called smectite. Dissolved organic molecules common in seawater are drawn into the crystal lattice of smectitic clay minerals where the organic matter is protected from oxidation and metabolization.

In summary, common organic sedimentary rocks area:

Chert – Lithified quartz skeletons in limestone
Coal – Lithified plant leaves and stems from marshes and swamps

Question: What are strata?

Answer
Layers of sedimentary deposit

Question: What is erosion?

Answer
Erosion is the process whereby weathered material is removed.

Question: Why does the ocean floor drop off steeply off the coast of Japan?

Answer
The deepest portion of the Pacific Ocean, the Challenger Deep, is located in the Mariana Trench in the western Pacific off of Japan.

The Challenger Deep in the southernmost Mariana Trench (western Pacific Ocean) is the deepest point on the Earth’s surface (10,920 m below sea level). Its location within a subduction trench, where one plate bends and descends below another. The Mariana Trench is the location where the Pacific Plate ducks steeply under the Philippine Plate.

Total immersion geologists: Are you totally obsessed with geology? If so, then you are a total immersion geologist. Here are some warning signs:

1) You judge a restaurant by the type of decorative building stone they use rather than their food.

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