Skip to main content

A glacial interpretation for the origin and formation of the Marinet Rock Glacier, Alpes Maritimes, France

Buy Article:

$51.00 plus tax (Refund Policy)

Abstract

Rock glaciers of the Southern French Alps, specifically the Marinet Rock Glacier, are commonly thought to have a ‘permafrost origin’. However, there are other rock glaciers in the Southern French Alps found in association with small corrie glaciers, suggesting that glacier ice has a role to play in their formation. At the Marinet Rock Glacier, results from ground surveys, relationships between debris and ice input, lichen dating and historical documentation suggest a glacial rather than a permafrost origin. Rock glacier palaeovelocities, calculated for an ice core within the rock glacier, suggest that it once moved much faster (up to 20 ma-1) than at present (<0.04 ma-1). This difference can be accommodated by a glacial explanation with development of the rock glacier over a 300 year period from the beginning of the Little Ice Age (derived from lichenometry). This relatively recent origin, compared to that required for a permafrost origin, accounts for the unstable nature of the rock glacier surface and its lack of vegetation. The very limited rock glacier movement shown at present (< 0.04 ma-1) is explained by the thinning of the ice core underneath a rock debris cover.
No References
No Citations
No Supplementary Data
No Data/Media
No Metrics

Document Type: Research Article

Affiliations: School of Geosciences, The Queen's University of Belfast, UK

Publication date: 1998-10-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more