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Holocene evolution of the merrimack embayment, northern massachusetts, interperted from shallow seismic stratigraphy

By:
, , and
DOI: 10.1061/40926(239)65

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Abstract

Recent multi-beam, backscatter, and bottom sediment data demonstrate that a large sand sheet was formed in the inner shelf by the reworking of the Merrimack River lowstand delta and braid plain (12 kya) during the Holocene transgression. Seismic data reveal the presence of widespread channel cut-and-fill structures landward of the delta suggesting that much of the sand sheet consists of braided stream deposits. These features map into several sets of cut-and-fill structures, indicating the avulsion of the primary river channels, which creates the lobes of the paleo-delta. Truncations of these, cut-and-fill structures suggest that the braid plain deposits were probably reworked during the Holocene transgression and may have contributed sand to developing barriers that presently border the Merrimack Embayment.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Holocene evolution of the merrimack embayment, northern massachusetts, interperted from shallow seismic stratigraphy
ISBN:
0784409269; 9780784409268
DOI:
10.1061/40926(239)65
Year Published:
2007
Language:
English
Larger Work Title:
Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes
Conference Title:
6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes
Conference Location:
New Orleans, LA
Conference Date:
13 May 2007 through 17 May 2007