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Author Question: What are the three categories of sedimentary rocks? What will be an ideal ... (Read 16 times)

nevelica

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on: Jul 16, 2018
What are the three categories of sedimentary rocks?
 
  What will be an ideal response?

Question 2

The Grinnell Formation in Glacier National Park contains mudcracks that date back nearly 1.5 billion years. How can delicate sedimentary structures such as these be preserved?
 
  What will be an ideal response?


micaelaswann

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Reply #1 on: Jul 16, 2018
Answer to Question 1

Answer: Detrital, chemical, and organic

Answer to Question 2

Answer: After the formation of the mudcracks, another depositional event affected the area, bringing in sediment to fill in the cracks.


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