Recent coastal submergence of the Maritime Provinces, Canada
Hydrographic, archeologic, and geologic evidence indicates that for the last 4000 y the Maritime Provinces have been submerging three to five times faster than the 6 cm/century rate of eustatic rise of sea level. After correcting for the eustatic change, the Bay of Fundy shows an anomalous submergen...
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1970
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Online Access: | http://dx.doi.org/10.1139/e70-067 http://www.nrcresearchpress.com/doi/pdf/10.1139/e70-067 |
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crcansciencepubl:10.1139/e70-067 2024-09-15T18:08:00+00:00 Recent coastal submergence of the Maritime Provinces, Canada Grant, Douglas R. 1970 http://dx.doi.org/10.1139/e70-067 http://www.nrcresearchpress.com/doi/pdf/10.1139/e70-067 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 7, issue 2, page 676-689 ISSN 0008-4077 1480-3313 journal-article 1970 crcansciencepubl https://doi.org/10.1139/e70-067 2024-07-25T04:10:08Z Hydrographic, archeologic, and geologic evidence indicates that for the last 4000 y the Maritime Provinces have been submerging three to five times faster than the 6 cm/century rate of eustatic rise of sea level. After correcting for the eustatic change, the Bay of Fundy shows an anomalous submergence of 24 cm/century, of which at least 15 cm/century is probably due mainly to rise of high tide, or increase of tidal range, beginning 4000–6000 y ago as eustatic sea-level rise widened and deepened the entrance to the Gulf of Maine. Submergence of the Atlantic coast of Nova Scotia, on the other hand, exceeds the eustatic rate by 9 cm/century, which can be largely explained by new mathematical models as isostatic subsidence of the earth's crust as the sea deepened eustatically over the continental shelf. Only a small part of the residual anomalies of 9 cm and 4 cm/century for the Fundy and Atlantic coasts, respectively, can be attributed to a combination of additional subsidence due to geosynclinal downwarping and relaxation of a possible glacier-margin peripheral bulge, thereby implicating other modes of regional crustal lowering. Article in Journal/Newspaper glacier* Canadian Science Publishing Canadian Journal of Earth Sciences 7 2 676 689 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
Hydrographic, archeologic, and geologic evidence indicates that for the last 4000 y the Maritime Provinces have been submerging three to five times faster than the 6 cm/century rate of eustatic rise of sea level. After correcting for the eustatic change, the Bay of Fundy shows an anomalous submergence of 24 cm/century, of which at least 15 cm/century is probably due mainly to rise of high tide, or increase of tidal range, beginning 4000–6000 y ago as eustatic sea-level rise widened and deepened the entrance to the Gulf of Maine. Submergence of the Atlantic coast of Nova Scotia, on the other hand, exceeds the eustatic rate by 9 cm/century, which can be largely explained by new mathematical models as isostatic subsidence of the earth's crust as the sea deepened eustatically over the continental shelf. Only a small part of the residual anomalies of 9 cm and 4 cm/century for the Fundy and Atlantic coasts, respectively, can be attributed to a combination of additional subsidence due to geosynclinal downwarping and relaxation of a possible glacier-margin peripheral bulge, thereby implicating other modes of regional crustal lowering. |
format |
Article in Journal/Newspaper |
author |
Grant, Douglas R. |
spellingShingle |
Grant, Douglas R. Recent coastal submergence of the Maritime Provinces, Canada |
author_facet |
Grant, Douglas R. |
author_sort |
Grant, Douglas R. |
title |
Recent coastal submergence of the Maritime Provinces, Canada |
title_short |
Recent coastal submergence of the Maritime Provinces, Canada |
title_full |
Recent coastal submergence of the Maritime Provinces, Canada |
title_fullStr |
Recent coastal submergence of the Maritime Provinces, Canada |
title_full_unstemmed |
Recent coastal submergence of the Maritime Provinces, Canada |
title_sort |
recent coastal submergence of the maritime provinces, canada |
publisher |
Canadian Science Publishing |
publishDate |
1970 |
url |
http://dx.doi.org/10.1139/e70-067 http://www.nrcresearchpress.com/doi/pdf/10.1139/e70-067 |
genre |
glacier* |
genre_facet |
glacier* |
op_source |
Canadian Journal of Earth Sciences volume 7, issue 2, page 676-689 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e70-067 |
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Canadian Journal of Earth Sciences |
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7 |
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2 |
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676 |
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689 |
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1810445358098022400 |