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Author Question: The distinctive type of sedimentary layering that has largest particles on the bottom and smallest ... (Read 106 times)

Mr.Thesaxman

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on: Aug 22, 2018
The distinctive type of sedimentary layering that has largest particles on the bottom and smallest particles on the top, with intermediate sized particles in the middle, is called which of the following?
 
  A) Graded Bedding
  B) Nonconformities
  C) Sandstone Layering
  D) Suspension Deposits
  E) Turbidity Currents

Question 2

Describe how the half-live of radioactive elements can be used to determine the age of rock through radiometric dating.
 
  What will be an ideal response?


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mk6555

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Reply #1 on: Aug 22, 2018
Answer to Question 1

A

Answer to Question 2

Most rocks on Earth contain small amounts of radioactive materials such as potassium, thorium, and uranium. Radioactive materials spontaneously decay into atoms of other elements. Each radioactive material has a characteristic half-life, which is the time required for one-half of the atoms in a sample to decay to atoms of other elements. The older a rock sample is the more radioactive material will have been converted to decay product(s). Instruments can accurately measure the amount of radioactive material and the amount of resulting decay product in a rock sample. By comparing the ratio of these two quantities, the age of a rock sample can be determined, which is referred to as radiometric age dating.


Mr.Thesaxman

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Reply #2 on: Aug 22, 2018
TY


mk6555

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Reply #3 on: Aug 22, 2018
You're welcome


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