Author Question: Describe the two processes by which sediments are transformed into sedimentary rocks. Which is the ... (Read 96 times)

kodithompson

  • Hero Member
  • *****
  • Posts: 566
Describe the two processes by which sediments are transformed into sedimentary rocks. Which is the more effective process in the lithification of sand- and gravel-sized sediments?
 
  What will be an ideal response?

Question 2

What are the two groups of chemical sedimentary rock? Give an example of a rock that belongs to each group.
 
  What will be an ideal response?



nothere

  • Sr. Member
  • ****
  • Posts: 324
Answer to Question 1

The two processes that transform sediments into sedimentary rocks include compaction and cementation. During compaction, as sediments accumulate through time, the weight of overlying material compresses the deeper sediments. As the grains are pressed closer and closer, pore space is greatly reduced. During cementation, the cementing materials are carried in solution by water that percolates through the pore spaces between particles. Over time, the cement precipitates onto the sediment grains, fills the open spaces, and acts like glue to join the particles together. Cementation is most effective process in the lithification of sand- and gravel-sized sediments.

Answer to Question 2

Chemical sedimentary rock can be inorganic chemical precipitate or made from biochemical sediments. Chemical sedimentary rocks include chert and travertine. Biochemical rocks include coquina, chalk, and diatomite.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

Elderly adults are at greatest risk of stroke and myocardial infarction and have the most to gain from prophylaxis. Patients ages 60 to 80 years with blood pressures above 160/90 mm Hg should benefit from antihypertensive treatment.

Did you know?

Famous people who died from poisoning or drug overdose include, Adolf Hitler, Socrates, Juan Ponce de Leon, Marilyn Monroe, Judy Garland, and John Belushi.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

For a complete list of videos, visit our video library