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Lateral Moraine, Alaska

Visual Glossary of Glacial Features

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Lateral moraines are sediment bodies plastered along the flanks of glaciers. (more below)
Glacial bathtub rings
Photo (c) 2005 Andrew Alden, licensed to About.com (fair use policy)
This U-shaped valley in Glacier Bay, Alaska, once held a glacier, which left a thick swath of glacial sediment along its sides. That lateral moraine is still visible, supporting some green vegetation. Moraine sediment, or till, is a mix of all particle sizes, and it can be quite hard if the clay size fraction is abundant.

A fresher lateral moraine is visible in the valley glacier picture.

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