SEISMIC STUDIES ON THE EASTERN SEABOARD OF CANADA: THE APPALACHIAN SYSTEM. I
The results of seismic refraction profiles in the Gulf of St. Lawrence and on the northwest and northeast coasts of Newfoundland are presented. The thickness of the crust is about 45 km in the region of the Gulf of St. Lawrence southwest of the Cabot Strait Trough, and off the northeast coast of New...
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Canadian Science Publishing
1966
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crcansciencepubl:10.1139/e66-007 2023-12-17T10:38:31+01:00 SEISMIC STUDIES ON THE EASTERN SEABOARD OF CANADA: THE APPALACHIAN SYSTEM. I Ewing, G. N. Dainty, A. M. Blanchard, J. E. Keen, M. J. 1966 http://dx.doi.org/10.1139/e66-007 http://www.nrcresearchpress.com/doi/pdf/10.1139/e66-007 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 3, issue 1, page 89-109 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1966 crcansciencepubl https://doi.org/10.1139/e66-007 2023-11-19T13:38:54Z The results of seismic refraction profiles in the Gulf of St. Lawrence and on the northwest and northeast coasts of Newfoundland are presented. The thickness of the crust is about 45 km in the region of the Gulf of St. Lawrence southwest of the Cabot Strait Trough, and off the northeast coast of Newfoundland east of the Long Range Mountains. One interpretation of the data suggests that the compressional wave velocities through the underlying mantle are 8.50 and 8.69 km s −1 respectively. An "intermediate" layer about 20 km thick is identified with compressional wave velocities of 7.35 and 7.52 km s −1 beneath these areas. A thinner crust, 33 km thick approximately, underlies the west coast of Newfoundland, and a crustal thickness of 35 km is postulated near Anticosti Island. The compressional wave velocity in the upper part of the mantle beneath this thinner crust is close to 8 km s −1 . The intermediate layer thins and, possibly, pinches out in the vicinity of Anticosti Island and northwest Newfoundland. The results lead to the suggestion that we see within the crust and upper mantle the subsurface expression of the two-sided nature of the Appalachian system. The system shows no sign of quietly dying away beneath the northeastern coast of Newfoundland. Article in Journal/Newspaper Newfoundland Canadian Science Publishing (via Crossref) Canada Cabot ENVELOPE(-54.600,-54.600,-63.383,-63.383) Canadian Journal of Earth Sciences 3 1 89 109 |
institution |
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 Ewing, G. N. Dainty, A. M. Blanchard, J. E. Keen, M. J. SEISMIC STUDIES ON THE EASTERN SEABOARD OF CANADA: THE APPALACHIAN SYSTEM. I |
topic_facet |
General Earth and Planetary Sciences |
description |
The results of seismic refraction profiles in the Gulf of St. Lawrence and on the northwest and northeast coasts of Newfoundland are presented. The thickness of the crust is about 45 km in the region of the Gulf of St. Lawrence southwest of the Cabot Strait Trough, and off the northeast coast of Newfoundland east of the Long Range Mountains. One interpretation of the data suggests that the compressional wave velocities through the underlying mantle are 8.50 and 8.69 km s −1 respectively. An "intermediate" layer about 20 km thick is identified with compressional wave velocities of 7.35 and 7.52 km s −1 beneath these areas. A thinner crust, 33 km thick approximately, underlies the west coast of Newfoundland, and a crustal thickness of 35 km is postulated near Anticosti Island. The compressional wave velocity in the upper part of the mantle beneath this thinner crust is close to 8 km s −1 . The intermediate layer thins and, possibly, pinches out in the vicinity of Anticosti Island and northwest Newfoundland. The results lead to the suggestion that we see within the crust and upper mantle the subsurface expression of the two-sided nature of the Appalachian system. The system shows no sign of quietly dying away beneath the northeastern coast of Newfoundland. |
format |
Article in Journal/Newspaper |
author |
Ewing, G. N. Dainty, A. M. Blanchard, J. E. Keen, M. J. |
author_facet |
Ewing, G. N. Dainty, A. M. Blanchard, J. E. Keen, M. J. |
author_sort |
Ewing, G. N. |
title |
SEISMIC STUDIES ON THE EASTERN SEABOARD OF CANADA: THE APPALACHIAN SYSTEM. I |
title_short |
SEISMIC STUDIES ON THE EASTERN SEABOARD OF CANADA: THE APPALACHIAN SYSTEM. I |
title_full |
SEISMIC STUDIES ON THE EASTERN SEABOARD OF CANADA: THE APPALACHIAN SYSTEM. I |
title_fullStr |
SEISMIC STUDIES ON THE EASTERN SEABOARD OF CANADA: THE APPALACHIAN SYSTEM. I |
title_full_unstemmed |
SEISMIC STUDIES ON THE EASTERN SEABOARD OF CANADA: THE APPALACHIAN SYSTEM. I |
title_sort |
seismic studies on the eastern seaboard of canada: the appalachian system. i |
publisher |
Canadian Science Publishing |
publishDate |
1966 |
url |
http://dx.doi.org/10.1139/e66-007 http://www.nrcresearchpress.com/doi/pdf/10.1139/e66-007 |
long_lat |
ENVELOPE(-54.600,-54.600,-63.383,-63.383) |
geographic |
Canada Cabot |
geographic_facet |
Canada Cabot |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Canadian Journal of Earth Sciences volume 3, issue 1, page 89-109 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e66-007 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
3 |
container_issue |
1 |
container_start_page |
89 |
op_container_end_page |
109 |
_version_ |
1785539835222556672 |