Glacial geology of the Torngat Mountains, Labrador
Two late Quaternary alloformations are identifed throughout the Torngat Mountains by degree of soil profile development in till with a granitic composition, morphologic expression of deposits, and their relative areal distribution. The two alloformations are interpreted to represent two, successivel...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1988
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e88-116 http://www.nrcresearchpress.com/doi/pdf/10.1139/e88-116 |
id |
crcansciencepubl:10.1139/e88-116 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e88-116 2023-12-17T10:31:45+01:00 Glacial geology of the Torngat Mountains, Labrador Clark, Peter U. 1988 http://dx.doi.org/10.1139/e88-116 http://www.nrcresearchpress.com/doi/pdf/10.1139/e88-116 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 25, issue 8, page 1184-1198 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1988 crcansciencepubl https://doi.org/10.1139/e88-116 2023-11-19T13:38:35Z Two late Quaternary alloformations are identifed throughout the Torngat Mountains by degree of soil profile development in till with a granitic composition, morphologic expression of deposits, and their relative areal distribution. The two alloformations are interpreted to represent two, successively limited glaciations of the Torngat Mountains by the Laurentide Ice Sheet. Deposits of the Shoal Cove Alloformation mantle hillslopes distal to deposits of the younger Saglek Alloformation. Deposits are primarily soliflucted till found around coastal regions. Soils developed in till of the Shoal Cove Alloformation are characterized by well-expressed Bw horizons ≥ 19 cm thick. Deposits of the younger Saglek Alloformation are characterized by prominent, well-preserved moraines, outwash fan surfaces, and ice-marginal channels. Soils described in till are poorly developed, with A horizons directly overlying Cox horizons, or separated from Cox horizons by thin, transitional (AC, CA) horizons or poorly expressed Bw horizons. During deposition of this alloformation, the Laurentide Ice Sheet was confined to major valleys and fiords, leaving large areas of the mountains ice free. Old radiocarbon dates on shells from diamictons on the Iron Strand coast do not provide a unique age for glacial events on the Labrador coast. Age of marine limit on the coast suggests deglaciation from the event depositing the Saglek Alloformation began 9 000 – 10 000 years BP. Article in Journal/Newspaper Ice Sheet Canadian Science Publishing (via Crossref) Torngat Mountains ENVELOPE(-63.665,-63.665,59.000,59.000) Shoal Cove ENVELOPE(-55.665,-55.665,49.533,49.533) Iron Strand ENVELOPE(-63.815,-63.815,59.550,59.550) Canadian Journal of Earth Sciences 25 8 1184 1198 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Clark, Peter U. Glacial geology of the Torngat Mountains, Labrador |
topic_facet |
General Earth and Planetary Sciences |
description |
Two late Quaternary alloformations are identifed throughout the Torngat Mountains by degree of soil profile development in till with a granitic composition, morphologic expression of deposits, and their relative areal distribution. The two alloformations are interpreted to represent two, successively limited glaciations of the Torngat Mountains by the Laurentide Ice Sheet. Deposits of the Shoal Cove Alloformation mantle hillslopes distal to deposits of the younger Saglek Alloformation. Deposits are primarily soliflucted till found around coastal regions. Soils developed in till of the Shoal Cove Alloformation are characterized by well-expressed Bw horizons ≥ 19 cm thick. Deposits of the younger Saglek Alloformation are characterized by prominent, well-preserved moraines, outwash fan surfaces, and ice-marginal channels. Soils described in till are poorly developed, with A horizons directly overlying Cox horizons, or separated from Cox horizons by thin, transitional (AC, CA) horizons or poorly expressed Bw horizons. During deposition of this alloformation, the Laurentide Ice Sheet was confined to major valleys and fiords, leaving large areas of the mountains ice free. Old radiocarbon dates on shells from diamictons on the Iron Strand coast do not provide a unique age for glacial events on the Labrador coast. Age of marine limit on the coast suggests deglaciation from the event depositing the Saglek Alloformation began 9 000 – 10 000 years BP. |
format |
Article in Journal/Newspaper |
author |
Clark, Peter U. |
author_facet |
Clark, Peter U. |
author_sort |
Clark, Peter U. |
title |
Glacial geology of the Torngat Mountains, Labrador |
title_short |
Glacial geology of the Torngat Mountains, Labrador |
title_full |
Glacial geology of the Torngat Mountains, Labrador |
title_fullStr |
Glacial geology of the Torngat Mountains, Labrador |
title_full_unstemmed |
Glacial geology of the Torngat Mountains, Labrador |
title_sort |
glacial geology of the torngat mountains, labrador |
publisher |
Canadian Science Publishing |
publishDate |
1988 |
url |
http://dx.doi.org/10.1139/e88-116 http://www.nrcresearchpress.com/doi/pdf/10.1139/e88-116 |
long_lat |
ENVELOPE(-63.665,-63.665,59.000,59.000) ENVELOPE(-55.665,-55.665,49.533,49.533) ENVELOPE(-63.815,-63.815,59.550,59.550) |
geographic |
Torngat Mountains Shoal Cove Iron Strand |
geographic_facet |
Torngat Mountains Shoal Cove Iron Strand |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Canadian Journal of Earth Sciences volume 25, issue 8, page 1184-1198 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e88-116 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
25 |
container_issue |
8 |
container_start_page |
1184 |
op_container_end_page |
1198 |
_version_ |
1785585139123748864 |