High-resolution seismic stratigraphy of late Quaternary deposits in Manitounouk Sound, northern Quebec: effects of rapid postglacial emergence
Manitounouk Sound contains a succession of postglacial deposits consisting of three acoustic units separated by disconformities. From base to top, these are (1) a stratified draped unit interpreted as of glaciolacustrine and glaciomarine origin, (2) an onlapping basin-fill unit of thick transparent...
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crcansciencepubl:10.1139/e99-003 2023-12-17T10:31:24+01:00 High-resolution seismic stratigraphy of late Quaternary deposits in Manitounouk Sound, northern Quebec: effects of rapid postglacial emergence Hill, Philip R Simard, Annie Héquette, Arnaud 1999 http://dx.doi.org/10.1139/e99-003 http://www.nrcresearchpress.com/doi/pdf/10.1139/e99-003 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 36, issue 4, page 549-563 ISSN 0008-4077 1480-3313 General Earth and Planetary Sciences journal-article 1999 crcansciencepubl https://doi.org/10.1139/e99-003 2023-11-19T13:39:23Z Manitounouk Sound contains a succession of postglacial deposits consisting of three acoustic units separated by disconformities. From base to top, these are (1) a stratified draped unit interpreted as of glaciolacustrine and glaciomarine origin, (2) an onlapping basin-fill unit of thick transparent beds interpreted as gravity-flow deposits, and (3) a divergent fill unit of stratified and transparent modern marine deposits. The gravity-flow deposits of unit 2 pass laterally into slide scars that truncate unit 1. Pollen and dinoflagellate analysis of cores correlated with the acoustic sections indicate that unit 1 is of early Holocene age and confirms a glaciomarine environment. Unit 3 contains modern assemblages of pollen and dinoflagellates. The slide scar and gravity-flow deposits of unit 2 correspond to the period of transition from glaciomarine to modern conditions and are interpreted to result from a period of relatively intense earthquake activity due to stress release along faults during or shortly after the deglaciation of Hudson Bay. Article in Journal/Newspaper Hudson Bay Canadian Science Publishing (via Crossref) Hudson Bay Hudson Canadian Journal of Earth Sciences 36 4 549 563 |
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Open Polar |
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Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
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English |
topic |
General Earth and Planetary Sciences |
spellingShingle |
General Earth and Planetary Sciences Hill, Philip R Simard, Annie Héquette, Arnaud High-resolution seismic stratigraphy of late Quaternary deposits in Manitounouk Sound, northern Quebec: effects of rapid postglacial emergence |
topic_facet |
General Earth and Planetary Sciences |
description |
Manitounouk Sound contains a succession of postglacial deposits consisting of three acoustic units separated by disconformities. From base to top, these are (1) a stratified draped unit interpreted as of glaciolacustrine and glaciomarine origin, (2) an onlapping basin-fill unit of thick transparent beds interpreted as gravity-flow deposits, and (3) a divergent fill unit of stratified and transparent modern marine deposits. The gravity-flow deposits of unit 2 pass laterally into slide scars that truncate unit 1. Pollen and dinoflagellate analysis of cores correlated with the acoustic sections indicate that unit 1 is of early Holocene age and confirms a glaciomarine environment. Unit 3 contains modern assemblages of pollen and dinoflagellates. The slide scar and gravity-flow deposits of unit 2 correspond to the period of transition from glaciomarine to modern conditions and are interpreted to result from a period of relatively intense earthquake activity due to stress release along faults during or shortly after the deglaciation of Hudson Bay. |
format |
Article in Journal/Newspaper |
author |
Hill, Philip R Simard, Annie Héquette, Arnaud |
author_facet |
Hill, Philip R Simard, Annie Héquette, Arnaud |
author_sort |
Hill, Philip R |
title |
High-resolution seismic stratigraphy of late Quaternary deposits in Manitounouk Sound, northern Quebec: effects of rapid postglacial emergence |
title_short |
High-resolution seismic stratigraphy of late Quaternary deposits in Manitounouk Sound, northern Quebec: effects of rapid postglacial emergence |
title_full |
High-resolution seismic stratigraphy of late Quaternary deposits in Manitounouk Sound, northern Quebec: effects of rapid postglacial emergence |
title_fullStr |
High-resolution seismic stratigraphy of late Quaternary deposits in Manitounouk Sound, northern Quebec: effects of rapid postglacial emergence |
title_full_unstemmed |
High-resolution seismic stratigraphy of late Quaternary deposits in Manitounouk Sound, northern Quebec: effects of rapid postglacial emergence |
title_sort |
high-resolution seismic stratigraphy of late quaternary deposits in manitounouk sound, northern quebec: effects of rapid postglacial emergence |
publisher |
Canadian Science Publishing |
publishDate |
1999 |
url |
http://dx.doi.org/10.1139/e99-003 http://www.nrcresearchpress.com/doi/pdf/10.1139/e99-003 |
geographic |
Hudson Bay Hudson |
geographic_facet |
Hudson Bay Hudson |
genre |
Hudson Bay |
genre_facet |
Hudson Bay |
op_source |
Canadian Journal of Earth Sciences volume 36, issue 4, page 549-563 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e99-003 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
36 |
container_issue |
4 |
container_start_page |
549 |
op_container_end_page |
563 |
_version_ |
1785584696299618304 |