Correlating Late Pleistocene Deposits on the Coastal Plain of Virginia with the Glacial-Eustatic Sea-Level Curve
Late Pleistocene sediments mapped along Virginia's southeastern coastal plain record deposition by high-frequency cycles during isotope stages 5 to 1. Correlations between several geologic units both south (S) and east (E) of the Chesapeake Bay have proven difficult due to insufficient dating m...
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ftolddominionuni:oai:digitalcommons.odu.edu:oeas_etds-1288 2024-04-14T08:13:18+00:00 Correlating Late Pleistocene Deposits on the Coastal Plain of Virginia with the Glacial-Eustatic Sea-Level Curve Scott, Timothy Wullschleger 2006-04-01T08:00:00Z application/pdf https://digitalcommons.odu.edu/oeas_etds/281 https://doi.org/10.25777/1xb0-1c44 https://digitalcommons.odu.edu/context/oeas_etds/article/1288/viewcontent/Scott_CorrelatingLatePleistoceneDeposits_2006_Redacted.pdf unknown ODU Digital Commons https://digitalcommons.odu.edu/oeas_etds/281 doi:10.25777/1xb0-1c44 https://digitalcommons.odu.edu/context/oeas_etds/article/1288/viewcontent/Scott_CorrelatingLatePleistoceneDeposits_2006_Redacted.pdf In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). OES Theses and Dissertations Paleoceanography Sea level Optically stimulated luminescence dating Pleistocene Oceanography Paleontology Sedimentology text 2006 ftolddominionuni https://doi.org/10.25777/1xb0-1c44 2024-03-21T15:49:29Z Late Pleistocene sediments mapped along Virginia's southeastern coastal plain record deposition by high-frequency cycles during isotope stages 5 to 1. Correlations between several geologic units both south (S) and east (E) of the Chesapeake Bay have proven difficult due to insufficient dating methods. To improve these regional correlations, two members of the Tabb Formation on Virginia's southside and two formations on the southern Delmarva Peninsula were selected for stratigraphic analyses. Ground penetrating radar provided geologic details in areas where samples were collected for optically stimulated luminescence (OSL) dating. The stratigraphically older units, Sedgefield Member of the Tabb Formation (S) and the Butlers Bluff Member of the Nassawadox Formation (E), yielded OSL dates of approximately 50 ka (stage 3) and 70 ka (stage 4; 5a assignment), respectively. The Butlers Bluff data match previous dates from coral in the Sedgefield; however, the dates from the Sedgefield were discarded due to a high concentration of U and Th indicating post-deposition migration into the sample site. The younger units, Poquoson Member of the Tabb Formation (S) and the Wachapreague Formation (E), yielded OSL dates of approximately 43 ka and 42 ka (stage 3), respectively. Maximum altitudes of marine depositional surfaces for these units range from +12 to +3 m. However, established glacial-eustatic sea-level curves, along with these dates and others reported for these units, suggest the units were deposited when sea level oscillated between +3 to -25 m. If both the sea-level curves and the dates are correct, then an uplift of at least 10 to 15 m must have occurred in order to explain the altitudes of these units. These discrepancies may arise from isostatic adjustments of the fore bulge peripheral to the Laurenti de Ice Sheet that would have been at maxima during isotope stages 6 and 2. If peripheral bulges develop and decay more slowly than eustatic sea-level responds to high-frequency climate change, then these depositional ... Text Ice Sheet Old Dominion University: ODU Digital Commons |
institution |
Open Polar |
collection |
Old Dominion University: ODU Digital Commons |
op_collection_id |
ftolddominionuni |
language |
unknown |
topic |
Paleoceanography Sea level Optically stimulated luminescence dating Pleistocene Oceanography Paleontology Sedimentology |
spellingShingle |
Paleoceanography Sea level Optically stimulated luminescence dating Pleistocene Oceanography Paleontology Sedimentology Scott, Timothy Wullschleger Correlating Late Pleistocene Deposits on the Coastal Plain of Virginia with the Glacial-Eustatic Sea-Level Curve |
topic_facet |
Paleoceanography Sea level Optically stimulated luminescence dating Pleistocene Oceanography Paleontology Sedimentology |
description |
Late Pleistocene sediments mapped along Virginia's southeastern coastal plain record deposition by high-frequency cycles during isotope stages 5 to 1. Correlations between several geologic units both south (S) and east (E) of the Chesapeake Bay have proven difficult due to insufficient dating methods. To improve these regional correlations, two members of the Tabb Formation on Virginia's southside and two formations on the southern Delmarva Peninsula were selected for stratigraphic analyses. Ground penetrating radar provided geologic details in areas where samples were collected for optically stimulated luminescence (OSL) dating. The stratigraphically older units, Sedgefield Member of the Tabb Formation (S) and the Butlers Bluff Member of the Nassawadox Formation (E), yielded OSL dates of approximately 50 ka (stage 3) and 70 ka (stage 4; 5a assignment), respectively. The Butlers Bluff data match previous dates from coral in the Sedgefield; however, the dates from the Sedgefield were discarded due to a high concentration of U and Th indicating post-deposition migration into the sample site. The younger units, Poquoson Member of the Tabb Formation (S) and the Wachapreague Formation (E), yielded OSL dates of approximately 43 ka and 42 ka (stage 3), respectively. Maximum altitudes of marine depositional surfaces for these units range from +12 to +3 m. However, established glacial-eustatic sea-level curves, along with these dates and others reported for these units, suggest the units were deposited when sea level oscillated between +3 to -25 m. If both the sea-level curves and the dates are correct, then an uplift of at least 10 to 15 m must have occurred in order to explain the altitudes of these units. These discrepancies may arise from isostatic adjustments of the fore bulge peripheral to the Laurenti de Ice Sheet that would have been at maxima during isotope stages 6 and 2. If peripheral bulges develop and decay more slowly than eustatic sea-level responds to high-frequency climate change, then these depositional ... |
format |
Text |
author |
Scott, Timothy Wullschleger |
author_facet |
Scott, Timothy Wullschleger |
author_sort |
Scott, Timothy Wullschleger |
title |
Correlating Late Pleistocene Deposits on the Coastal Plain of Virginia with the Glacial-Eustatic Sea-Level Curve |
title_short |
Correlating Late Pleistocene Deposits on the Coastal Plain of Virginia with the Glacial-Eustatic Sea-Level Curve |
title_full |
Correlating Late Pleistocene Deposits on the Coastal Plain of Virginia with the Glacial-Eustatic Sea-Level Curve |
title_fullStr |
Correlating Late Pleistocene Deposits on the Coastal Plain of Virginia with the Glacial-Eustatic Sea-Level Curve |
title_full_unstemmed |
Correlating Late Pleistocene Deposits on the Coastal Plain of Virginia with the Glacial-Eustatic Sea-Level Curve |
title_sort |
correlating late pleistocene deposits on the coastal plain of virginia with the glacial-eustatic sea-level curve |
publisher |
ODU Digital Commons |
publishDate |
2006 |
url |
https://digitalcommons.odu.edu/oeas_etds/281 https://doi.org/10.25777/1xb0-1c44 https://digitalcommons.odu.edu/context/oeas_etds/article/1288/viewcontent/Scott_CorrelatingLatePleistoceneDeposits_2006_Redacted.pdf |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
OES Theses and Dissertations |
op_relation |
https://digitalcommons.odu.edu/oeas_etds/281 doi:10.25777/1xb0-1c44 https://digitalcommons.odu.edu/context/oeas_etds/article/1288/viewcontent/Scott_CorrelatingLatePleistoceneDeposits_2006_Redacted.pdf |
op_rights |
In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). |
op_doi |
https://doi.org/10.25777/1xb0-1c44 |
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1796311262038065152 |