Surficial materials of Massachusetts—A 1:24,000-scale geologic map database

Grain Size and Beach Face Slope on Paraglacial Beaches of New England, USA

“…Cretaceous (and Cenozoic) sediments underlie the glacially derived and postglacial material of Cape Cod and the islands to the south in Massachusetts (Finch, 1823;Oldale and Barlow, 1986;Stone et al, 2018). This area was initially considered part of the New England Physiographic EarthArXiv preprint under review in Marine Geology region (Fenneman, 1917(Fenneman, , 1916, because here Cretaceous (and Cenozoic) coastal plain sediments lie largely below sea level, whereas this sequence would be extensively exposed further to the south on Long Island in New York State, if it were not covered by post-glacial materials.…”

“…The Nahant site and Revere Beach are both sourced by fine-grained stratified deposits (Table 1) that underlie later post-glacial deposits throughout the Boston area ( Fig. 1) (Stone et al, 2018).…”

“…Along the south shore of Massachusetts Bay, Peggotty, Humarock and Marshfield beaches are mixed beaches receiving sediment from the erosion of both coarse stratified deposits (glacial outwash) and glacial till (Table 1; Fig. 1) (Stone et al, 2018). The Plymouth site is located to the south of Marshfield and lies adjacent to an extensive, glacial outwash deposit characterized by very hummocky, kame and kettle terrain ( Fig.…”