The giant steps of Bug Creek, Richardson Mountains, N.W.T., Canada
This paper describes large steps developed in sandstones of the Jurassic Bug Creek Formation on a 5 km long plateau in the Richardson Mountains, Northwest Territories, Canada. Except for the steps atop the plateau, the planar portion or tread of each step abuts a riser or a scarp at its upper end an...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | https://doi.org/10.1002/ppp.562 |
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ftrepec:oai:RePEc:wly:perpro:v:17:y:2006:i:3:p:267-275 2023-05-15T17:46:39+02:00 The giant steps of Bug Creek, Richardson Mountains, N.W.T., Canada Bernard Lauriol Iannick Lamirande André E. Lalonde https://doi.org/10.1002/ppp.562 unknown https://doi.org/10.1002/ppp.562 article ftrepec https://doi.org/10.1002/ppp.562 2020-12-04T13:31:25Z This paper describes large steps developed in sandstones of the Jurassic Bug Creek Formation on a 5 km long plateau in the Richardson Mountains, Northwest Territories, Canada. Except for the steps atop the plateau, the planar portion or tread of each step abuts a riser or a scarp at its upper end and a block barricade at its lower end. The weathering of bedrock and blocks supplies fine sediments that cover the surface of the treads. The thickness of the surficial cover appears to be less than 120 cm. According to nine 14C dates, the sediments are Holocene in age. This study stresses two features of the giant steps: subterranean drainage and the presence of block barricades. It is proposed: (1) that subterranean drainage plays an important role in the preservation of block barricades; and (2) that the giant steps can evolve into cryoplanation terraces if the block barricades are destroyed by erosion. Copyright © 2006 John Wiley & Sons, Ltd. Article in Journal/Newspaper Northwest Territories RePEc (Research Papers in Economics) Bug Creek ENVELOPE(-135.391,-135.391,68.075,68.075) Canada Northwest Territories Richardson Mountains ENVELOPE(-136.171,-136.171,67.000,67.000) Permafrost and Periglacial Processes 17 3 267 275 |
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Open Polar |
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RePEc (Research Papers in Economics) |
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ftrepec |
language |
unknown |
description |
This paper describes large steps developed in sandstones of the Jurassic Bug Creek Formation on a 5 km long plateau in the Richardson Mountains, Northwest Territories, Canada. Except for the steps atop the plateau, the planar portion or tread of each step abuts a riser or a scarp at its upper end and a block barricade at its lower end. The weathering of bedrock and blocks supplies fine sediments that cover the surface of the treads. The thickness of the surficial cover appears to be less than 120 cm. According to nine 14C dates, the sediments are Holocene in age. This study stresses two features of the giant steps: subterranean drainage and the presence of block barricades. It is proposed: (1) that subterranean drainage plays an important role in the preservation of block barricades; and (2) that the giant steps can evolve into cryoplanation terraces if the block barricades are destroyed by erosion. Copyright © 2006 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
Bernard Lauriol Iannick Lamirande André E. Lalonde |
spellingShingle |
Bernard Lauriol Iannick Lamirande André E. Lalonde The giant steps of Bug Creek, Richardson Mountains, N.W.T., Canada |
author_facet |
Bernard Lauriol Iannick Lamirande André E. Lalonde |
author_sort |
Bernard Lauriol |
title |
The giant steps of Bug Creek, Richardson Mountains, N.W.T., Canada |
title_short |
The giant steps of Bug Creek, Richardson Mountains, N.W.T., Canada |
title_full |
The giant steps of Bug Creek, Richardson Mountains, N.W.T., Canada |
title_fullStr |
The giant steps of Bug Creek, Richardson Mountains, N.W.T., Canada |
title_full_unstemmed |
The giant steps of Bug Creek, Richardson Mountains, N.W.T., Canada |
title_sort |
giant steps of bug creek, richardson mountains, n.w.t., canada |
url |
https://doi.org/10.1002/ppp.562 |
long_lat |
ENVELOPE(-135.391,-135.391,68.075,68.075) ENVELOPE(-136.171,-136.171,67.000,67.000) |
geographic |
Bug Creek Canada Northwest Territories Richardson Mountains |
geographic_facet |
Bug Creek Canada Northwest Territories Richardson Mountains |
genre |
Northwest Territories |
genre_facet |
Northwest Territories |
op_relation |
https://doi.org/10.1002/ppp.562 |
op_doi |
https://doi.org/10.1002/ppp.562 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
17 |
container_issue |
3 |
container_start_page |
267 |
op_container_end_page |
275 |
_version_ |
1766150444736839680 |