Call number:
ZSP-202-94
In:
Research report / Cold Regions Research and Engineering Laboratory, 94
Description / Table of Contents:
Summary: A new mechanism is described which explains the formation of moraines in the ablation areas of cold ice caps. The mechanism involves the freezing of water onto the bottom surface of an ice cap. This water comes from regions of the bottom surface where the combination of the geothermal heat and the heat produced by sliding of ice over the bed is sufficient to melt ice. A number of criticisms are made of the shear hypothesis, which has been advanced to explain moraines occurring on Baffin Island and near Thule, Greenland. It is concluded that this older hypothesis may be inadequate to account for these moraines. Although in theory the mechanism proposed here undoubtedly would lead to the formation of moraines, the existing field data are insufficient to prove conclusively that actual moraines have originated in this way.
Type of Medium:
Series available for loan
Pages:
iv, 12 Seiten
,
Illustrationen
Series Statement:
Research report / Cold Regions Research and Engineering Laboratory 94
URL:
https://hdl.handle.net/11681/5876
Language:
English
Note:
CONTENTS
Preface
Summary
Introduction
Comments on the shear hypothesis
Appearance of the debris layers
The possibility of cold ice scraping up debris
The shear across a debris layer
The geometry of the debris layers
Freezing model
Theory
Discussion
Conclusion
References
Location:
AWI Archive
Branch Library:
AWI Library
