Title Bar: Illustrated Glossary of Alpine Glacial 
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GROUND MORAINE

    Erosional Landforms
    Arete
    Cirque
    Col
    Giant stair steps
    Glacial trough
    Groove
    Hanging valley
    Headwall
    Horn
    Paternoster lakes
    Striations
    Tarn
    U-shaped valley

    Depositional Landforms
    Moraine
    End moraine
    Ground moraine
    Lateral moraine
    Medial moraine

    Ice Features
    Cirque glacier
    Valley glacier
    Crevasse
    Ice fall
    Ogives

Tilll deposited directly beneath a glacier; till deposited between glacial ice and underlying bedrock. Ground moraine is located behind end moraines.
Photo: ground moraine

All the rock debris shown in the foreground of this photo constitutes ground moraine. The material was formerly beneath Grinnell Glacier. Debris in moraines ranges in size from fine silt, which you cannot see in this photo, to large boulders; thus, moraine deposits are unsorted. The rock debris deposited by glaciers also tends to be angular. The sharp, angular edges of the rocks are evident in the photo. Ground moraine is exposed as glaciers retreat. Grinnell Glacier is located off the photo to the left. A large proglacial lake containing floating slabs of ice occupies the lower-middle portion of the photo.

Photo: R. Schukar. Used with permission.

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All commercial rights reserved. Copyright 2010 by Karen A. Lemke. Earlier copyright 2002 by Karen A. Lemke, and 1998 by Karen A. Lemke and Linda Freeman.
Last updated June 2010 KAL.