Question

The layers in the rock in the picture are curved downward. What is the most likely explanation for this feature?

A.
Pressure in the Earth's crust has folded the rock layers which used to be level.
B.
A fault line shifted horizontally, moving the rock layers.
C.
A heavy object pushed down the rock layers which used to be level.
D.
The layer of rock was made curved and was never level.

Answer 1

A. Pressure in Earth's crust has folded the rock layers which used to be level.

Answer 2

The answer is A. This earth’s pressure is most likely the one involved in the formation of fold mountains such as the Himalayas. They are formed in a convergent plate boundary. This is when two tectonic plates press on one another. Sedimentary rocks in the region will fold and the different layers will exhibit this folding – one arc of the slope is concave shaped while the other slope will be convex shaped.