A valley was covered by a glacier. The glacier deposited boulders, mud, and sand along
its edges.
Over thousands of years, the glacier melted, and a lake formed in the valley. Mud was
deposited at the bottom of the lake, on top of the older sediment.
Which rock sequence is more likely to form from the sediment layers described above?
younger
older
shale
limestone
younger
shale
older
conglomerate
