There have been several instances in the last 150 years when valuable materials such as diamonds have been found contained in glacial debris. if one wanted to try to trace such valuable materials back to their source, which moraine would be most useful for tracing valuable gold deposits back to their bedrock source area
a. recessional moraine
b. terminal moraine
c. lateral moraine
d. esker

c. Lateral moraine

Explanation:

As a glacier moves, it moves dirt and rock in its path. The residual deposit is known as a moraine. A Lateral Moraines is formed on the sides of a glacier, displaced on either side of the glacier.

During this movement, gold deposits may accumulate but are mixed in with the debris. As the glacier melts, the water naturally sorts gold from the lighter materials. The gold is then deposited in high quantities on bedrocks in lateral moraines