Geology of Belle Isle—northern extremity of the deformed Appalachian miogeosynclinal belt
Belle Isle, situated between northern Newfoundland and the southeast coast of Labrador, consists of an uplifted block of Precambrian plutonic rocks intruded by northeast-trending diabase dikes and uncomformably overlain by Lower Cambrian and earlier (?) sedimentary and volcanic rocks. The Precambria...
Published in: | Canadian Journal of Earth Sciences |
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Language: | English |
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Canadian Science Publishing
1969
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Online Access: | http://dx.doi.org/10.1139/e69-116 http://www.nrcresearchpress.com/doi/pdf/10.1139/e69-116 |
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crcansciencepubl:10.1139/e69-116 2024-06-23T07:54:43+00:00 Geology of Belle Isle—northern extremity of the deformed Appalachian miogeosynclinal belt Williams, Harold Stevens, R. K. 1969 http://dx.doi.org/10.1139/e69-116 http://www.nrcresearchpress.com/doi/pdf/10.1139/e69-116 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 6, issue 5, page 1145-1157 ISSN 0008-4077 1480-3313 journal-article 1969 crcansciencepubl https://doi.org/10.1139/e69-116 2024-05-30T08:13:49Z Belle Isle, situated between northern Newfoundland and the southeast coast of Labrador, consists of an uplifted block of Precambrian plutonic rocks intruded by northeast-trending diabase dikes and uncomformably overlain by Lower Cambrian and earlier (?) sedimentary and volcanic rocks. The Precambrian rocks lie along strike and are similar to Grenville gneisses of the Long Range Complex of western Newfoundland. In the southwest part of Belle Isle, the cover rocks are gently dipping basaltic flows and agglomerates that are succeeded conformably by arkosic sandstones and fossiliferous upper Lower Cambrian shales. In the northeast, the basement rocks are overlain by steeply dipping boulder conglomerates and arkosic sandstones, followed conformably by white quartzites.Diabase dikes are inseparable from overlying flows, but do not penetrate higher sedimentary strata of the southwestern Lower Cambrian succession. Toward the northeast, plutonic boulder conglomerates and quartzites are cut by the dikes.The distribution of supracrustal rocks around the periphery of the island, combined with local steeply inclined surfaces of unconformity between basement and cover rocks, indicate a major anticlinal structure produced by Paleozoic deformation. The study also shows that at Belle Isle the established Lower Cambrian succession of southeast Labrador and western Newfoundland is locally underlain by basalts and conglomerates and quartzites that thicken southeastward and northeastward. Article in Journal/Newspaper Newfoundland Canadian Science Publishing Newfoundland Belle Isle ENVELOPE(-55.357,-55.357,51.942,51.942) Canadian Journal of Earth Sciences 6 5 1145 1157 |
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Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Belle Isle, situated between northern Newfoundland and the southeast coast of Labrador, consists of an uplifted block of Precambrian plutonic rocks intruded by northeast-trending diabase dikes and uncomformably overlain by Lower Cambrian and earlier (?) sedimentary and volcanic rocks. The Precambrian rocks lie along strike and are similar to Grenville gneisses of the Long Range Complex of western Newfoundland. In the southwest part of Belle Isle, the cover rocks are gently dipping basaltic flows and agglomerates that are succeeded conformably by arkosic sandstones and fossiliferous upper Lower Cambrian shales. In the northeast, the basement rocks are overlain by steeply dipping boulder conglomerates and arkosic sandstones, followed conformably by white quartzites.Diabase dikes are inseparable from overlying flows, but do not penetrate higher sedimentary strata of the southwestern Lower Cambrian succession. Toward the northeast, plutonic boulder conglomerates and quartzites are cut by the dikes.The distribution of supracrustal rocks around the periphery of the island, combined with local steeply inclined surfaces of unconformity between basement and cover rocks, indicate a major anticlinal structure produced by Paleozoic deformation. The study also shows that at Belle Isle the established Lower Cambrian succession of southeast Labrador and western Newfoundland is locally underlain by basalts and conglomerates and quartzites that thicken southeastward and northeastward. |
format |
Article in Journal/Newspaper |
author |
Williams, Harold Stevens, R. K. |
spellingShingle |
Williams, Harold Stevens, R. K. Geology of Belle Isle—northern extremity of the deformed Appalachian miogeosynclinal belt |
author_facet |
Williams, Harold Stevens, R. K. |
author_sort |
Williams, Harold |
title |
Geology of Belle Isle—northern extremity of the deformed Appalachian miogeosynclinal belt |
title_short |
Geology of Belle Isle—northern extremity of the deformed Appalachian miogeosynclinal belt |
title_full |
Geology of Belle Isle—northern extremity of the deformed Appalachian miogeosynclinal belt |
title_fullStr |
Geology of Belle Isle—northern extremity of the deformed Appalachian miogeosynclinal belt |
title_full_unstemmed |
Geology of Belle Isle—northern extremity of the deformed Appalachian miogeosynclinal belt |
title_sort |
geology of belle isle—northern extremity of the deformed appalachian miogeosynclinal belt |
publisher |
Canadian Science Publishing |
publishDate |
1969 |
url |
http://dx.doi.org/10.1139/e69-116 http://www.nrcresearchpress.com/doi/pdf/10.1139/e69-116 |
long_lat |
ENVELOPE(-55.357,-55.357,51.942,51.942) |
geographic |
Newfoundland Belle Isle |
geographic_facet |
Newfoundland Belle Isle |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Earth Sciences volume 6, issue 5, page 1145-1157 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e69-116 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
6 |
container_issue |
5 |
container_start_page |
1145 |
op_container_end_page |
1157 |
_version_ |
1802646983835385856 |