Question

read the text. then answer the question.
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?
two diagrams of rock layers are shown, first with shale (younger) over conglomerate (older), second with shale (younger) over limestone (older)

Explanation:

Step1: Identify older sediment

Glacier deposits boulders/mud/sand (conglomerate source).

Step2: Identify younger sediment

Lake mud (shale source, over older sediment).

Step3: Match rock types

Older layer: conglomerate (from mixed sediments); Younger layer: shale (from mud).

Answer:

The rock sequence with conglomerate (older) at the bottom and shale (younger) on top.