Show simple item record

dc.contributor.authorBrothers, Laura L.  Concept link
dc.contributor.authorFoster, David S.  Concept link
dc.contributor.authorPendleton, Elizabeth A.  Concept link
dc.contributor.authorBaldwin, Wayne E.  Concept link
dc.date.accessioned2020-09-23T19:14:22Z
dc.date.available2020-09-23T19:14:22Z
dc.date.issued2020-07-10
dc.identifier.citationBrothers, L. L., Foster, D. S., Pendleton, E. A., & Baldwin, W. E. (2020). Seismic stratigraphic framework of the continental shelf offshore Delmarva, USA: implications for Mid-Atlantic Bight evolution since the Pliocene. Marine Geology, 428, 106287.en_US
dc.identifier.urihttps://hdl.handle.net/1912/26212
dc.description© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Brothers, L. L., Foster, D. S., Pendleton, E. A., & Baldwin, W. E. Seismic stratigraphic framework of the continental shelf offshore Delmarva, USA: implications for Mid-Atlantic Bight evolution since the Pliocene. Marine Geology, 428, : (2020)106287, doi:10.1016/j.margeo.2020.106287.en_US
dc.description.abstractUnderstanding how past coastal systems have evolved is critical to predicting future coastal change. Using over 12,000 trackline kilometers of recently collected, co-located multi-channel boomer, sparker and chirp seismic reflection profile data integrated with previously collected borehole and vibracore data, we define the upper (< 115 m below mean lower low water) seismic stratigraphic framework offshore of the Delmarva Peninsula, USA. Twelve seismic units and 11 regionally extensive unconformities (U1-U11) were mapped over 5900 km2 of North America's Mid-Atlantic continental shelf. We interpret U3, U7, U9, U11 as transgressive ravinement surfaces, while U1,2,4,5,6,8,10 are subaerial unconformities illustrating distinct periods of lower sea-level. Based on areal distribution, stratigraphic relationships and dating results (Carbon 14 and amino acid racemization estimates) from earlier vibracore and borehole studies, we interpret the infilled channels as late Neogene and Quaternary courses of the Susquehanna, Potomac, Rappahannock, York, James rivers and tributaries, and a broad flood plain. These findings indicate that the region's geologic framework is more complex than previously thought and that Pleistocene paleochannels are abundant in the Mid-Atlantic. This study synthesizes and correlates the findings of other Atlantic Margin studies and establishes a large-scale Quaternary framework that enables more detailed stratigraphic analysis in the future. Such work has implications for inner continental shelf systems tract evolution, the relationship between antecedent geology and modern coastal systems, assessments of eustacy, glacial isostatic adjustment, and other processes and forcings that play a role in passive margin evolution.en_US
dc.description.sponsorshipThis work was supported by the U.S. Department of the Interior's Response to Hurricane Sandy.en_US
dc.publisherElsevieren_US
dc.relation.urihttps://doi.org/10.1016/j.margeo.2020.106287
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjectN Atlanticen_US
dc.subjectShelf (morphology and stratigraphy)en_US
dc.subjectQuaternary stratigraphyen_US
dc.subjectPaleochannelsen_US
dc.subjectGeophysics (seismic)en_US
dc.titleSeismic stratigraphic framework of the continental shelf offshore Delmarva, USA: implications for Mid-Atlantic Bight evolution since the Plioceneen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/j.margeo.2020.106287


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record

Attribution 4.0 International
Except where otherwise noted, this item's license is described as Attribution 4.0 International