Deep-water facies and depositional setting of the lower Conception Group (Hadrynian), southern Avalon Peninsula, Newfoundland
The lower part of the Hadrynian Conception Group is exposed in coastal outcrops near Holyrood Pond, St. Mary's Bay. Deep-water sediments of the Mall Bay Formation (>800 m) are overlain by glaciogenic debris flows of the Gaskiers Formation (250–300 m) and then by renewed turbidite deposition...
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1988
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crcansciencepubl:10.1139/e88-151 2024-09-15T18:20:10+00:00 Deep-water facies and depositional setting of the lower Conception Group (Hadrynian), southern Avalon Peninsula, Newfoundland Gardiner, S. Hiscott, R. N. 1988 http://dx.doi.org/10.1139/e88-151 http://www.nrcresearchpress.com/doi/pdf/10.1139/e88-151 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 25, issue 10, page 1579-1594 ISSN 0008-4077 1480-3313 journal-article 1988 crcansciencepubl https://doi.org/10.1139/e88-151 2024-08-08T04:13:37Z The lower part of the Hadrynian Conception Group is exposed in coastal outcrops near Holyrood Pond, St. Mary's Bay. Deep-water sediments of the Mall Bay Formation (>800 m) are overlain by glaciogenic debris flows of the Gaskiers Formation (250–300 m) and then by renewed turbidite deposition in the lower part of the Drook Formation (1000 m examined; formation thickness 1500 m). The main facies in the Mall Bay and Drook formations are thinly to very thickly bedded sand stone–mudstone couplets (turbidites), amalgamated in the thicker and coarser beds, and graded-stratified siltstones–mudstones. These are interpreted as deposits on an extensive basin floor and on the lower and middle parts of small-scale submarine fans that prograded from fringing volcanic islands. Paleocurrent data indicate a complex paleogeography dominated by active volcanic islands, probably like some modern volcanic arcs. The Gaskiers Formation was generated by glaciation of these islands.The Malll Bay Formation contains lenticular and wavy bedded siltstones–mudstones interpreted as the deposits of bottom currents, perhaps flowing parallel to the contours of the volcanic islands. In Phanerozoic sediments, bottom-current deposits in this setting would probably be thoroughly bioturbated. Article in Journal/Newspaper Newfoundland Canadian Science Publishing Canadian Journal of Earth Sciences 25 10 1579 1594 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
The lower part of the Hadrynian Conception Group is exposed in coastal outcrops near Holyrood Pond, St. Mary's Bay. Deep-water sediments of the Mall Bay Formation (>800 m) are overlain by glaciogenic debris flows of the Gaskiers Formation (250–300 m) and then by renewed turbidite deposition in the lower part of the Drook Formation (1000 m examined; formation thickness 1500 m). The main facies in the Mall Bay and Drook formations are thinly to very thickly bedded sand stone–mudstone couplets (turbidites), amalgamated in the thicker and coarser beds, and graded-stratified siltstones–mudstones. These are interpreted as deposits on an extensive basin floor and on the lower and middle parts of small-scale submarine fans that prograded from fringing volcanic islands. Paleocurrent data indicate a complex paleogeography dominated by active volcanic islands, probably like some modern volcanic arcs. The Gaskiers Formation was generated by glaciation of these islands.The Malll Bay Formation contains lenticular and wavy bedded siltstones–mudstones interpreted as the deposits of bottom currents, perhaps flowing parallel to the contours of the volcanic islands. In Phanerozoic sediments, bottom-current deposits in this setting would probably be thoroughly bioturbated. |
format |
Article in Journal/Newspaper |
author |
Gardiner, S. Hiscott, R. N. |
spellingShingle |
Gardiner, S. Hiscott, R. N. Deep-water facies and depositional setting of the lower Conception Group (Hadrynian), southern Avalon Peninsula, Newfoundland |
author_facet |
Gardiner, S. Hiscott, R. N. |
author_sort |
Gardiner, S. |
title |
Deep-water facies and depositional setting of the lower Conception Group (Hadrynian), southern Avalon Peninsula, Newfoundland |
title_short |
Deep-water facies and depositional setting of the lower Conception Group (Hadrynian), southern Avalon Peninsula, Newfoundland |
title_full |
Deep-water facies and depositional setting of the lower Conception Group (Hadrynian), southern Avalon Peninsula, Newfoundland |
title_fullStr |
Deep-water facies and depositional setting of the lower Conception Group (Hadrynian), southern Avalon Peninsula, Newfoundland |
title_full_unstemmed |
Deep-water facies and depositional setting of the lower Conception Group (Hadrynian), southern Avalon Peninsula, Newfoundland |
title_sort |
deep-water facies and depositional setting of the lower conception group (hadrynian), southern avalon peninsula, newfoundland |
publisher |
Canadian Science Publishing |
publishDate |
1988 |
url |
http://dx.doi.org/10.1139/e88-151 http://www.nrcresearchpress.com/doi/pdf/10.1139/e88-151 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Earth Sciences volume 25, issue 10, page 1579-1594 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e88-151 |
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Canadian Journal of Earth Sciences |
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25 |
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10 |
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1579 |
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1594 |
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1810458532028350464 |