Stratigraphy of the Ordovician St. George Group in the Port-Au-Choix Area, Western Newfoundland
Stratigraphic sections were measured in the very complete coastal exposures around Port-au-Choix village in western Newfoundland. A formal stratigraphic subdivision of the Ordovician St. George Group into three formations is proposed. They are, from oldest to youngest: the Barbace Point Formation, a...
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Canadian Science Publishing
1975
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Online Access: | http://dx.doi.org/10.1139/e75-053 http://www.nrcresearchpress.com/doi/pdf/10.1139/e75-053 |
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crcansciencepubl:10.1139/e75-053 2023-12-17T10:44:24+01:00 Stratigraphy of the Ordovician St. George Group in the Port-Au-Choix Area, Western Newfoundland Kluyver, H. M. 1975 http://dx.doi.org/10.1139/e75-053 http://www.nrcresearchpress.com/doi/pdf/10.1139/e75-053 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 12, issue 4, page 589-594 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1975 crcansciencepubl https://doi.org/10.1139/e75-053 2023-11-19T13:38:25Z Stratigraphic sections were measured in the very complete coastal exposures around Port-au-Choix village in western Newfoundland. A formal stratigraphic subdivision of the Ordovician St. George Group into three formations is proposed. They are, from oldest to youngest: the Barbace Point Formation, a 21 + m thick unit of dense dolostone, showing diagenetic solution features; the Catoche Formation, 100 m thick, consisting of well bedded limestones with shallow-water indications; the Port-au-Choix Formation, 35 m thick, massive sugary dolostones grading into silty dolostones, with diagenetic solution features. Detailed descriptions of all new formations are given, as well as the rationale behind this new nomenclature. The Early Ordovician depositional history of the area is seen as a succession of two erosional and depositional cycles, not completely preserved in the record, whereby the Barbace Point Formation was subjected to subaerial erosion, creating a hiatus between this formation and the overlying Catoche Formation; the latter represents the beginning of a new depositional cycle which was possibly interrupted before the youngest Port-au-Choix Formation was deposited. After Port-au-Choix times, renewed erosion took place before the Table Head Group was formed. Article in Journal/Newspaper Newfoundland Port au Choix Canadian Science Publishing (via Crossref) Port au Choix ENVELOPE(-57.365,-57.365,50.717,50.717) Table Head ENVELOPE(-55.698,-55.698,52.083,52.083) Barbace Point ENVELOPE(-57.348,-57.348,50.733,50.733) Canadian Journal of Earth Sciences 12 4 589 594 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Kluyver, H. M. Stratigraphy of the Ordovician St. George Group in the Port-Au-Choix Area, Western Newfoundland |
topic_facet |
General Earth and Planetary Sciences |
description |
Stratigraphic sections were measured in the very complete coastal exposures around Port-au-Choix village in western Newfoundland. A formal stratigraphic subdivision of the Ordovician St. George Group into three formations is proposed. They are, from oldest to youngest: the Barbace Point Formation, a 21 + m thick unit of dense dolostone, showing diagenetic solution features; the Catoche Formation, 100 m thick, consisting of well bedded limestones with shallow-water indications; the Port-au-Choix Formation, 35 m thick, massive sugary dolostones grading into silty dolostones, with diagenetic solution features. Detailed descriptions of all new formations are given, as well as the rationale behind this new nomenclature. The Early Ordovician depositional history of the area is seen as a succession of two erosional and depositional cycles, not completely preserved in the record, whereby the Barbace Point Formation was subjected to subaerial erosion, creating a hiatus between this formation and the overlying Catoche Formation; the latter represents the beginning of a new depositional cycle which was possibly interrupted before the youngest Port-au-Choix Formation was deposited. After Port-au-Choix times, renewed erosion took place before the Table Head Group was formed. |
format |
Article in Journal/Newspaper |
author |
Kluyver, H. M. |
author_facet |
Kluyver, H. M. |
author_sort |
Kluyver, H. M. |
title |
Stratigraphy of the Ordovician St. George Group in the Port-Au-Choix Area, Western Newfoundland |
title_short |
Stratigraphy of the Ordovician St. George Group in the Port-Au-Choix Area, Western Newfoundland |
title_full |
Stratigraphy of the Ordovician St. George Group in the Port-Au-Choix Area, Western Newfoundland |
title_fullStr |
Stratigraphy of the Ordovician St. George Group in the Port-Au-Choix Area, Western Newfoundland |
title_full_unstemmed |
Stratigraphy of the Ordovician St. George Group in the Port-Au-Choix Area, Western Newfoundland |
title_sort |
stratigraphy of the ordovician st. george group in the port-au-choix area, western newfoundland |
publisher |
Canadian Science Publishing |
publishDate |
1975 |
url |
http://dx.doi.org/10.1139/e75-053 http://www.nrcresearchpress.com/doi/pdf/10.1139/e75-053 |
long_lat |
ENVELOPE(-57.365,-57.365,50.717,50.717) ENVELOPE(-55.698,-55.698,52.083,52.083) ENVELOPE(-57.348,-57.348,50.733,50.733) |
geographic |
Port au Choix Table Head Barbace Point |
geographic_facet |
Port au Choix Table Head Barbace Point |
genre |
Newfoundland Port au Choix |
genre_facet |
Newfoundland Port au Choix |
op_source |
Canadian Journal of Earth Sciences volume 12, issue 4, page 589-594 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e75-053 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
12 |
container_issue |
4 |
container_start_page |
589 |
op_container_end_page |
594 |
_version_ |
1785562212204544000 |