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Swiss Journal of Palaeontology
Fig. 1 | Swiss Journal of Palaeontology

Fig. 1

From: Geochemical evidence (C and Sr isotopes) for methane seeps as ammonite habitats in the Late Cretaceous (Campanian) Western Interior Seaway

Fig. 1

Map showing locations of seeps within the Western Interior Seaway of North America. Shaded areas in upper map show broad distribution of seeps in South Dakota, Montana, Wyoming, and Colorado. The circles in the inset map indicate detailed locations of individual seeps in the Didymoceras cheyennense and Baculites compressus Zones (modified from Landman et al. 2012)

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