This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: How do geologists determine the number of ice ages and when they happened? What will be an ideal ... (Read 59 times)

jake

  • Hero Member
  • *****
  • Posts: 538
on: Jul 16, 2018
How do geologists determine the number of ice ages and when they happened?
 
  What will be an ideal response?

Question 2

Because glacial ice is a natural, consolidated aggregate of minerals, it is considered to be a rock. Explain what type of rock it is: igneous, metamorphic, or sedimentary.
 
  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

jaymee143

  • Sr. Member
  • ****
  • Posts: 341
Reply #1 on: Jul 16, 2018
Answer to Question 1

The best record of the timing of past ice ages, although indirect, comes from measuring the ratio of oxygen isotopes in tiny foraminifera shells that accumulated in successive layers of deep-sea sediment. The ratio of the 18O to 16O is strongly affected by the amount of water that is evaporated from the ocean and stored on continents as glacial ice. The isotope ratios in layers of different ages can, therefore, track the occurrence of past ice ages.

Answer to Question 2

Glacial ice is a metamorphic rock because it forms from the recrystallization of snow due to increasing pressure with burial beneath the glacier surface.


jake

  • Member
  • Posts: 538
Reply 2 on: Jul 16, 2018
Great answer, keep it coming :)

ghepp

  • Member
  • Posts: 361
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

A number of tree species can be interconnected by mycorrhizal fungi in the forests of British Columb A number of tree species can be interconnected by mycorrhizal fungi in the forests of British Columb
How to determine if a function is even or odd How to determine if a function is even or odd
Number Facts Number Facts
Determine exact value of tan2x,sin2x, and cos2x Determine exact value of tan2x,sin2x, and cos2x
Algebraically determine the general solution, in degrees, of the equation below. Algebraically determine the general solution, in degrees, of the equation below.
Determine the mass of a nonvolatile, nonionizing compound that must be added to 4.76 kg of ... Determine the mass of a nonvolatile, nonionizing compound that must be added to 4.76 kg of ...
Video: Membrane transport proteins - pores, gated channels and pumps

For a complete list of videos, visit our video library