[Geology & Weather Reviews]


The diagram to the right represents a rock core drilled from a region consisting of only 4 sedimentary rock layers: A, B, C, and D.

 

 

 

 

9. Which geologic event best explains the order of the layers found in the rock core?

a. Explosive volcanoes caused rapid deposition of the sedimentary rock layers.

b. Long-term erosion caused a break in the rock record.

c. Extensive rock folding caused the rock layers to overturn.

d. Intrusion of magma resulted in an igneous rock layer between the deposition of layer A and layer D.

 

 

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