This topic contains a solution. Click here to go to the answer

Author Question: How do geologists do correlation using rocks and fossils? What will be an ideal ... (Read 75 times)

c0205847

  • Hero Member
  • *****
  • Posts: 531
How do geologists do correlation using rocks and fossils? What will be an ideal response?

Question 2

Why is correlation needed to construct a complete geologic history of a region? How does correlation
  work, e.g., in the Colorado Plateau region? What will be an ideal response?




Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

rachel

  • Sr. Member
  • ****
  • Posts: 323
Answer to Question 1

Rock types can be matched up on the basis of similar rock type and superposition, but correlation of
this type can be done only in a limited area where beds can be traced from site to site. To correlate
over larger areas or rocks of different composition, fossils must be used. Fossils are useful because
many organisms lived for a certain length of time. The overlapping geologic ranges of fossil species
allow definition of time intervals because each species is unique and had a definite duration.



Answer to Question 2

No single location in a region has a geologic record of all events that occurred in its history;
correlation allows geologists to determine the complete geologic history of the region. The entire 2-
billion-year record of the Colorado Plateau is not preserved in a single location due to erosion. By
correlating the uppermost rocks at one location with the lowermost equivalent rocks of another area,
the entire geologic sequence can be put together





rachel

  • Sr. Member
  • ****
  • Posts: 323

 

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

For a complete list of videos, visit our video library