While hiking up a mountain valley, you come upon a lake, dammed by wall of unconsolidated sediments. You suspect that those sediments may have been deposited across the valley by a glacier that has since melted away. Describe thoroughly what those sediments would look like and why they could not be from a stream. Viewing up the valley, what other clue would support it being a glaciated valley rather than a stream valley? Large boulders are strewn haphazardly throughout the valley as well? Does that evidence support a glacier depositing the boulders or a stream depositing the boulders? Defend your reasoning.
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