Question

read the text. then answer the question.
a valley was filled by a lake. mud was deposited at the bottom of the lake. over time, the climate of the area became colder. a glacier formed where the lake once was. sand, mud, and boulders were deposited on top of the older sediment.
which rock sequence is more likely to form from the sediment layers described above?
two rock sequence diagrams: first with conglomerate (younger) over shale (older); second with limestone (younger) over conglomerate (older)

Explanation:

Step1: Identify older sediment type

Lake mud forms shale (fine-grained sedimentary rock).

Step2: Identify younger sediment type

Glacial deposits (sand, mud, boulders) form conglomerate (coarse-grained with rounded stones).

Step3: Match sequence to layers

Older layer (shale) at bottom, younger layer (conglomerate) on top.

Answer:

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