Science · 6 pages · 12 min
How a moraine records where ice stood
A moraine is debris piled where a glacier margin stayed long enough.
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From the opening
A moraine is the ridge or blanket of debris a glacier drops when its edge stays in one place long enough for rock to pile up. The landform records where that margin stood, written in unsorted rubble rather than in a surveyed line. The opening covers till piled at a standing edge, terminal ridges and later pauses, and side ridges and medial stripes.
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Inside
- Till piled at a standing edge
- Terminal ridges and later pauses
- Side ridges and medial stripes
- A position, not a year
- Where the idea stops applying
- A distinction worth keeping
Sources
- Till deposited at a glacier margin
- Terminal, recessional, and lateral moraines