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

January 1, 2007

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.

Citation Information

Publication Year 2007
Title Holocene evolution of the merrimack embayment, northern massachusetts, interperted from shallow seismic stratigraphy
DOI 10.1061/40926(239)65
Authors C.J. Hein, D. M. FitzGerald, W. A. Barnhardt
Publication Type Conference Paper
Publication Subtype Conference Paper
Series Title
Series Number
Index ID 70029989
Record Source USGS Publications Warehouse
USGS Organization