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A. Introduction

• classification based on morphology

• surficial features

B. Glacier Classification

Glaciers unconstrained by topography

• underlying morphology has only slight impact on glacier shape or flow

• flow is downward and outward from one or more central domes

• examples

  • ice sheets

  • ice caps

  Image credit: NASA Blue Marble

  Iceland image: Vatnajokull, Iceland GSFC/NASA

  • ice streams

  Image credit: NASA/GSFC

  • ice shelves

  Image credit: NOAA

  Image credit: NASA/JPL

Glaciers constrained by topography

• underlying morphology directly impacts glacier shape and flow

• flow is downhill

• examples

  • ice fields and outlet glaciers

  Image credit: USGS

  Image credit: USGS

  • piedmont glaciers

  Image credit: USGS

  • valley/alpine glaciers and cirque glaciers

  Image credit: photo credit: S. Hillebrand, US FWS

  Image credit: Molnia/USGS Glossary of Glacial Terminology

C. Surface Features

• Crevasses

longitudinal

transverse

• Ice falls & ogives

Image: L. Freeman. Used with permission.

Image credit: B. Molnia. USGS

• Rivers & moulins

Image credit: GSFC/NASA

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D. Summary

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©Karen A. Lemke: klemke@uwsp.edu
Last revised January 26, 2009