POCsusp collection stations in the north central Gulf of Mexico during 2010–2017. The Deepwater Horizon (DWH) site is indicated by a white X in the upper right of the main map and emphasized by a red arrow. North central Gulf (NCG) sites are indicated by green triangles; seep stations, by black circles; western GOM (WGOM) sites, by purple triangles. Data from Cherrier et al. (2014) in the Desoto Canyon are indicated by orange triangles. Sampling sites for biogenic methane in the water column are indicated by pink triangles. The inset map shows an enlarged view of the DWH site (black X) and surrounding sampling sites. The southern biogenic methane sampling site (pink triangle) was approximately 5,900 m east of a seep site. DOI: https://doi.org/10.1525/elementa.389.f2