Questions for Sedimentary Rock Notes
- Imagine you are a paleontologist; a person who studies extinct plants and animals. Would you rather go looking for fossils in an area where the bed rock was mostly basalt or mostly sandstone? Explain your choice.
- Describe the two types of sedimentary rock.
- Clastic rocks are made of rock and mineral fragments. List the three categories of those fragments in order from the largest to the smallest fragment sizes.
- What is a chemical precipitate?
- Of the two types of sedimentary rocks, which is the most useful for human society? Why do you think this?
- List the steps for forming a sedimentary rock.
- Describe an effect of industrialized human society that has increased chemical weathering.
- Sixteen thousand years ago what agent of erosion was hard at work in Western Washington state?
- Describe the agents of erosion that are now at work here.
- Sediments from floods are often not well sorted. Explain why that is.
- List the two processes of lithification. Of these which is the most important?
- How is lithification different from freezing?
- How is lava solidifying different from freezing? (or is it?)
- While going on a long hike you notice the bedrock around you is a sandstone. A few miles later you see a small clam shell in the bedrock and also realize the bedrock is now siltstone. You tell your hiking buddies that by the time you reach the hike's endpoint (four miles away) the bedrock will be limestone. To your friend's amazement you are correct! How did you know?
- Why are sedimentary rocks overly represented on the continents? Hint: what about mineral density?