The near-surface geology of St. Georges Bay, Nova Scotia: implications for the Hollow Fault

A formline contour map, which depicts the near-surface, structural configuation of the strata underlying St. Georges Bay, northeastern Nova Scotia, was made from bedding attitude data compiled in the coastal areas; apparent dips measured from single-channel seismic reflection data; and true strikes...

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Published in:Canadian Journal of Earth Sciences
Main Authors: Durling, P., Howells, K., Harvey, P.
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 1995
Subjects:
Online Access:http://dx.doi.org/10.1139/e95-051
http://www.nrcresearchpress.com/doi/pdf/10.1139/e95-051
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spelling crcansciencepubl:10.1139/e95-051 2024-05-19T07:38:30+00:00 The near-surface geology of St. Georges Bay, Nova Scotia: implications for the Hollow Fault Durling, P. Howells, K. Harvey, P. 1995 http://dx.doi.org/10.1139/e95-051 http://www.nrcresearchpress.com/doi/pdf/10.1139/e95-051 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 32, issue 5, page 603-613 ISSN 0008-4077 1480-3313 journal-article 1995 crcansciencepubl https://doi.org/10.1139/e95-051 2024-05-02T06:51:26Z A formline contour map, which depicts the near-surface, structural configuation of the strata underlying St. Georges Bay, northeastern Nova Scotia, was made from bedding attitude data compiled in the coastal areas; apparent dips measured from single-channel seismic reflection data; and true strikes and dips calculated at survey track intersections. The geology interpreted from the formline map is characterized by northeast-striking faults and fold axes. The folds in the bay comprise broad, open synclines and narrow, tightly folded or faulted anticlines. Gravity and deep seismic reflection data suggest that the faulted anticlines are intruded by salt. Correlations from offshore to onshore suggest that the structures mapped offshore in the bay extend onshore. The onshore extensions of the faulted anticlines are mapped as faults, and their antiformal nature is subdued. They are locally associated onshore with Carboniferous Windsor Group outcrop. The offshore extension of the Hollow Fault, which is interpreted as a major northeast-striking, Carboniferous strike-slip fault, was mapped as a 1500–2500 m wide deformation zone, using deep seismic reflection data. Gravity lows coincident with the deformation zone are interpreted as being caused by salt intrusions. The trend of the Hollow Fault Zone suggests that this fault complex (and its associated strike-slip movement) continues on land near Mabou, Cape Breton Island. However, it does not appear to continue offshore along the northwest coast of Cape Breton Island, as previously suggested. Article in Journal/Newspaper Breton Island Canadian Science Publishing Canadian Journal of Earth Sciences 32 5 603 613
institution Open Polar
collection Canadian Science Publishing
op_collection_id crcansciencepubl
language English
description A formline contour map, which depicts the near-surface, structural configuation of the strata underlying St. Georges Bay, northeastern Nova Scotia, was made from bedding attitude data compiled in the coastal areas; apparent dips measured from single-channel seismic reflection data; and true strikes and dips calculated at survey track intersections. The geology interpreted from the formline map is characterized by northeast-striking faults and fold axes. The folds in the bay comprise broad, open synclines and narrow, tightly folded or faulted anticlines. Gravity and deep seismic reflection data suggest that the faulted anticlines are intruded by salt. Correlations from offshore to onshore suggest that the structures mapped offshore in the bay extend onshore. The onshore extensions of the faulted anticlines are mapped as faults, and their antiformal nature is subdued. They are locally associated onshore with Carboniferous Windsor Group outcrop. The offshore extension of the Hollow Fault, which is interpreted as a major northeast-striking, Carboniferous strike-slip fault, was mapped as a 1500–2500 m wide deformation zone, using deep seismic reflection data. Gravity lows coincident with the deformation zone are interpreted as being caused by salt intrusions. The trend of the Hollow Fault Zone suggests that this fault complex (and its associated strike-slip movement) continues on land near Mabou, Cape Breton Island. However, it does not appear to continue offshore along the northwest coast of Cape Breton Island, as previously suggested.
format Article in Journal/Newspaper
author Durling, P.
Howells, K.
Harvey, P.
spellingShingle Durling, P.
Howells, K.
Harvey, P.
The near-surface geology of St. Georges Bay, Nova Scotia: implications for the Hollow Fault
author_facet Durling, P.
Howells, K.
Harvey, P.
author_sort Durling, P.
title The near-surface geology of St. Georges Bay, Nova Scotia: implications for the Hollow Fault
title_short The near-surface geology of St. Georges Bay, Nova Scotia: implications for the Hollow Fault
title_full The near-surface geology of St. Georges Bay, Nova Scotia: implications for the Hollow Fault
title_fullStr The near-surface geology of St. Georges Bay, Nova Scotia: implications for the Hollow Fault
title_full_unstemmed The near-surface geology of St. Georges Bay, Nova Scotia: implications for the Hollow Fault
title_sort near-surface geology of st. georges bay, nova scotia: implications for the hollow fault
publisher Canadian Science Publishing
publishDate 1995
url http://dx.doi.org/10.1139/e95-051
http://www.nrcresearchpress.com/doi/pdf/10.1139/e95-051
genre Breton Island
genre_facet Breton Island
op_source Canadian Journal of Earth Sciences
volume 32, issue 5, page 603-613
ISSN 0008-4077 1480-3313
op_rights http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining
op_doi https://doi.org/10.1139/e95-051
container_title Canadian Journal of Earth Sciences
container_volume 32
container_issue 5
container_start_page 603
op_container_end_page 613
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