Skip to Main Content
Book Chapter

The rock coasts of polar and sub-polar regions

By
J. D. Hansom
J. D. Hansom
Department of Geographical and Earth Sciences, University of Glasgow, Glasgow G12 8QQ, UK
Search for other works by this author on:
D. L. Forbes
D. L. Forbes
Geological Survey of Canada, Bedford Institute of Oceanography, 1 Challenger Drive, PO Box 1006, Dartmouth, NS, Canada B2Y 4A2Department of Geography, Memorial University of Newfoundland, St John’s, NL, Canada A1B 3X9
Search for other works by this author on:
S. Etienne
S. Etienne
Laboratoire de Géomorphologie et Environnement Littoral, Ecole Pratique des Hautes Etudes, CNRS – Prodig (UMR 8586), CNRS – GDR Mutations Polaires, 15, Boulevard de la Mer, 35800 Dinard, France
Search for other works by this author on:
Published:
January 01, 2014

Abstract

Polar and subpolar coasts are distinctive owing to the presence of ice on land as permafrost, ground ice and glacier ice, and in the sea as tidewater glaciers, icebergs, ice shelves and sea ice. Most of these coasts remain glaciated or are recently deglaciated so their geomorphology carries a strong glacial signature. The morphogenetic environment of polar and subpolar coasts is dominated by extreme seasonality with winter development of sea ice and a shore-fast ice foot that excludes wave activity and is primarily protective. However, sea ice may also be erosional at any time of year but is most effective as an erosional agent on polar coasts between freeze-up and break-up, when wave activity forces sea ice to repeatedly impact the shore. Depending on latitude, the short summers are characterized by wave and sea ice erosion at high latitudes and by wave activity at lower latitudes. The contribution of frost weathering to cliff and shore platform development in polar and subpolar rock coasts is unclear, but is likely to be an important influence. Rock coasts are widespread in the Arctic and sub-Arctic, including Iceland, and in the Antarctic and sub-Antarctic the limited ice-free coast is almost entirely rock-dominated.

You do not currently have access to this article.

Figures & Tables

Contents

Geological Society, London, Memoirs

Rock Coast Geomorphology: A Global Synthesis

D.M. Kennedy
D.M. Kennedy
The University of Melbourne, Australia
Search for other works by this author on:
W. J. Stephenson
W. J. Stephenson
University of Otago, New Zealand
Search for other works by this author on:
L. A. Naylor
L. A. Naylor
University of Glasgow, UK
Search for other works by this author on:
Geological Society of London
Volume
40
ISBN electronic:
9781862397002
Publication date:
January 01, 2014

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal