An increase through time in the proportion of heavy oxygen ( ) in a sequence of carbonate sediments implies ____________.
A)the sediments are young enough to have been exposed to radiation from underground nuclear testing
B) the organisms that secreted the carbonate favored over the far more abundant
C) Earth was becoming warmer over time
D) Earth was becoming cooler over time

Question

An increase through time in the proportion of heavy oxygen (  ) in a sequence of carbonate sediments implies ____________.
A)the sediments are young enough to have been exposed to radiation from underground nuclear testing 
B) the organisms that secreted the carbonate favored over the far more abundant 
C) Earth was becoming warmer over time 
D) Earth was becoming cooler over time

Quizplus · Accepted Answer

The Answer of An increase through time in the proportion of heavy oxygen (  ) in a sequence of carbonate sediments implies ____________.
A)the sediments are young enough to have been exposed to radiation from underground nuclear testing 
B) the organisms that secreted the carbonate favored over the far more abundant 
C) Earth was becoming warmer over time 
D) Earth was becoming cooler over time

An Increase Through Time in the Proportion of Heavy Oxygen