What evidence is necessary to prove that batholiths form over a ...

[Anajune7]

What evidence is necessary to prove that batholiths form over a long period of time by multiple intrusions of differing composition?
 
  What will be an ideal response?

Question 2

Greater involvement by the federal government in the management of MSW disposal started with the Resource and Conservation and Recovery Act about
 
  A) 40 years ago and is currently the responsibility of the EPA.
  B) 100 years ago and has been under the authority of the FDA.
  C) 15 years ago and is largely supervised by the Department of Agriculture.
  D) 60 years ago and is controlled by the Bureau of Land Management.

[Liddy]

Answer to Question 1

Field relationships would show multiple intrusions. The earliest intruded magma solidifies into plutonic rock. Subsequent magma intrusions form a cross-cutting network of igneous intrusions that comprise the batholith. These different plutonic bodies would have different compositions as illustrated by different rock types.

Answer to Question 2

A

[Anajune7]

Excellent

[lindahyatt42]

Gracias!