Tributary glaciers do not erode the bedrock as deeply as the main glacial valley; therefore, when ice melts the tributary valley floor sits at a higher elevation and produces a _____ above the main valley's floor.

Question

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Tributary glaciers do not erode the bedrock as deeply as the main glacial valley, which means when ice melts, the tributary valley floor sits at a higher elevation and produces a hanging valley above the main valley's floor.

Tributary Glaciers Do Not Erode the Bedrock as Deeply as the Main