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Pockmarks in Passamaquoddy Bay, New Brunswick, Canada

June 15, 2016

Pockmarks are seafloor depressions associated with fluid escape (Judd & Hovland 2007). They proliferate in the muddy seafloors of coastal Gulf of Maine and Bay of Fundy, where they are associated with shallow natural gas likely of biogenic origin (Ussler et al. 2003; Rogers et al. 2006; Wildish et al. 2008). In North America, shallow-water pockmark fields are not reported south of Long Island Sound, despite the abundance of gassy, muddy estuaries. The absence of pockmarks south of the limit of North American glaciation suggests that local and regional heterogeneities, possibly related to glacial or sea-level history or bedrock geology, influence pockmark field distribution. In shallow-water embayments, such as Passamaquoddy Bay, New Brunswick, pockmarks can be large (>200 m diameter) and number in the thousands.

Publication Year 2016
Title Pockmarks in Passamaquoddy Bay, New Brunswick, Canada
DOI 10.1144/M46.60
Authors Laura L. Brothers, Christine Legere, J.E. Hughes Clark, J.T. Kelley, Walter Barnhardt, Brian Andrews, D.F. Belknap
Publication Type Article
Publication Subtype Journal Article
Series Title Geological Society, London, Memoirs
Index ID 70186615
Record Source USGS Publications Warehouse
USGS Organization Woods Hole Coastal and Marine Science Center