Question

What can be assumed about the layers in areas 2 and 4?

The layers formed from sand dunes.


The layers were originally horizontal.


The layers formed in a marine environment.


The layers were deposited in a river bed.

Answer 1

B

Step-by-step explanation:

Answer 2

The layers were originally horizontal.

Step-by-step explanation:

We will be correct to say that both layers 2 and 4 were originally horizontal.

As with all sedimentary beds, they are originally laid horizontally in their basin of deposition.

• They both now occur in a folded structure.
• The fold is an anticline and it youngs upward.
• Layer 2 is older than 4
• At the time of deposition, we can know the geometry of the beds by the principle of original horizontality.
• Which suggests that beds are originally laid down flat in a basin.