The sedimentation history of Lake Huron and Georgian Bay: results from analysis of seismic reflection profiles

An extensive seismic reflection profile survey conducted concun:ently with a sediment coring program in northern Lake Huron, Georgian Bay, and the North Channel revealed a detailed Holocene lake level history. Seven acoustic sequences were identified in the seismic stratigraphy, and these sequences...

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Main Authors: David M. Dobson, Theodore C. Moore, David K. Rea
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 1994
Subjects:
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.424.6937
http://deepblue.lib.umich.edu/bitstream/handle/2027.42/43070/10933_2004_Article_BF00682767.pdf;jsessionid=AC0C860188AC28F67A75B45BF5B8B16A?sequence=1
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spelling ftciteseerx:oai:CiteSeerX.psu:10.1.1.424.6937 2023-05-15T16:41:17+02:00 The sedimentation history of Lake Huron and Georgian Bay: results from analysis of seismic reflection profiles David M. Dobson Theodore C. Moore David K. Rea The Pennsylvania State University CiteSeerX Archives 1994 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.424.6937 http://deepblue.lib.umich.edu/bitstream/handle/2027.42/43070/10933_2004_Article_BF00682767.pdf;jsessionid=AC0C860188AC28F67A75B45BF5B8B16A?sequence=1 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.424.6937 http://deepblue.lib.umich.edu/bitstream/handle/2027.42/43070/10933_2004_Article_BF00682767.pdf;jsessionid=AC0C860188AC28F67A75B45BF5B8B16A?sequence=1 Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://deepblue.lib.umich.edu/bitstream/handle/2027.42/43070/10933_2004_Article_BF00682767.pdf;jsessionid=AC0C860188AC28F67A75B45BF5B8B16A?sequence=1 text 1994 ftciteseerx 2016-01-08T04:14:19Z An extensive seismic reflection profile survey conducted concun:ently with a sediment coring program in northern Lake Huron, Georgian Bay, and the North Channel revealed a detailed Holocene lake level history. Seven acoustic sequences were identified in the seismic stratigraphy, and these sequences show great variation in both the character and the spatial distribution of sediment deposition through time. The depths to the acoustically-defined sequence boundaries were digitized from the analog seismic records and merged with Loran-C navigation records from the cruise, yielding a three-dimensional record of the location of each sequence boundary. Thicknesses of the sequences were calculated from these depths, and a minimum-curvature spline surface was fit to the thickness data. These surfaces were used to construct isopach maps which show the trends in thickness of sediment accumulation throughout the lake basins for each of the sequences. 14C-AMS dates of materials from the cores fixed the dates of the sediment sequence boundaries, allowing sediment accumulation rates to be calculated. The distribution of sedimentation in the basins as shown on the isopach maps allowed assessment of sediment transport and water flow through the basins over time, which when combined with the work of Lewis & Anderson (1989), provides a detailed record of the transport and drainage of water through these basins as the Wisconsinan ice sheet retreated and isostatic rebound opened and closed outlets. Reversals of flow direction through the Straits of Mackinac and through the channels connecting Lake Huron and Georgian Bay and the North Channel are indicated by changes in sediment thickness distributions. Text Ice Sheet Unknown Loran ENVELOPE(-55.609,-55.609,52.249,52.249)
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description An extensive seismic reflection profile survey conducted concun:ently with a sediment coring program in northern Lake Huron, Georgian Bay, and the North Channel revealed a detailed Holocene lake level history. Seven acoustic sequences were identified in the seismic stratigraphy, and these sequences show great variation in both the character and the spatial distribution of sediment deposition through time. The depths to the acoustically-defined sequence boundaries were digitized from the analog seismic records and merged with Loran-C navigation records from the cruise, yielding a three-dimensional record of the location of each sequence boundary. Thicknesses of the sequences were calculated from these depths, and a minimum-curvature spline surface was fit to the thickness data. These surfaces were used to construct isopach maps which show the trends in thickness of sediment accumulation throughout the lake basins for each of the sequences. 14C-AMS dates of materials from the cores fixed the dates of the sediment sequence boundaries, allowing sediment accumulation rates to be calculated. The distribution of sedimentation in the basins as shown on the isopach maps allowed assessment of sediment transport and water flow through the basins over time, which when combined with the work of Lewis & Anderson (1989), provides a detailed record of the transport and drainage of water through these basins as the Wisconsinan ice sheet retreated and isostatic rebound opened and closed outlets. Reversals of flow direction through the Straits of Mackinac and through the channels connecting Lake Huron and Georgian Bay and the North Channel are indicated by changes in sediment thickness distributions.
author2 The Pennsylvania State University CiteSeerX Archives
format Text
author David M. Dobson
Theodore C. Moore
David K. Rea
spellingShingle David M. Dobson
Theodore C. Moore
David K. Rea
The sedimentation history of Lake Huron and Georgian Bay: results from analysis of seismic reflection profiles
author_facet David M. Dobson
Theodore C. Moore
David K. Rea
author_sort David M. Dobson
title The sedimentation history of Lake Huron and Georgian Bay: results from analysis of seismic reflection profiles
title_short The sedimentation history of Lake Huron and Georgian Bay: results from analysis of seismic reflection profiles
title_full The sedimentation history of Lake Huron and Georgian Bay: results from analysis of seismic reflection profiles
title_fullStr The sedimentation history of Lake Huron and Georgian Bay: results from analysis of seismic reflection profiles
title_full_unstemmed The sedimentation history of Lake Huron and Georgian Bay: results from analysis of seismic reflection profiles
title_sort sedimentation history of lake huron and georgian bay: results from analysis of seismic reflection profiles
publishDate 1994
url http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.424.6937
http://deepblue.lib.umich.edu/bitstream/handle/2027.42/43070/10933_2004_Article_BF00682767.pdf;jsessionid=AC0C860188AC28F67A75B45BF5B8B16A?sequence=1
long_lat ENVELOPE(-55.609,-55.609,52.249,52.249)
geographic Loran
geographic_facet Loran
genre Ice Sheet
genre_facet Ice Sheet
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