By the end of the Permian, the Absaroka Sea had retreated from ...

[Evvie72]

By the end of the Permian, the Absaroka Sea had retreated from the craton, exposing what type of deposits?
 A)evaporite
 B)black shale
 C)volcanic
 D)red bed
 E)reef

Question 2

What is a cone of depression, where is it found, and what causes it? Why can large cones of depression be a serious problem?

[Ahernandez18]

Answer to Question 1

D

Answer to Question 2

A cone of depression is where the water table is lower in a cone shape in the area around a well. It is caused by excess groundwater pumping; that is when discharge from a water well exceeds recharge or the rate of groundwater flow. Large cones of depression are a problem because they can cause shallow wells in the immediate vicinity to go dry.

[Evvie72]

Gracias!

[ricroger]

TYSM