Unit 12: Sedimentary Rocks

Test Date: ________________

Learning Targets (LT)I will be able to...

1. analyze and identify various sedimentary rocks in terms of origin, grain size, texture, and composition.2. identify the following as sedimentary: sandstone, conglomerate, breccia, shale, limestone, coquina, coal,

chalk 3. differentiate between clastic and non-clastic (organic and chemical) sedimentary rocks.4. Describe how fossils are formed5. Compare and contrast the different fossil types6. Describe how sediments can be deposited, including the features they may form7. Describe soil texture8. Label and describe each soil horizon

Vocabulary: Define in your own words by the unit test.

sediment cementation Chemical sedimentary rock compaction clastic sedimentary rock deposition Parent rock Organic sedimentary rock fossil Stratification / strata mold castTrace fossil Petrified fossil Carbon filmAlluvial fan Sand dune deltahorizon Humus regolith

ROCKS TO KNOW: You do not need to define the following words, but you must be able to describe them.sandstone conglomerate shale limestone breccia coquina chalk coal

Sample Questions                    

1. Use the following identification chart to find the texture, composition, grain size (if needed), sediment shape (if needed), and formation process for each of the sedimentary rocks shown on the next page.

Breccia Rock Salt Coquina Coal

Shale Sandstone Conglomerate Limestone

2. What causes sediments to be either angular or rounded?

3. What is the differences between the three major types of sedimentary rocks?

4. What two processes form clastic sedimentary rocks?

5. Of the three rock types, only sedimentary rocks contain fossils. Why?

6. In what type of depositional environment might a sandstone form? A shale? A limestone?

7. How does the depositional environment differ between a conglomerate?

8. Describe how fossils are formed.

9. Name the following types of fossils:

     

10. What is the name of the soil with…a. 40% clay, 10% silt, 50% sandb. 20% clay, 60% silt, 20% sand

11. Label and describe each soil horizon.