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Vascoceras birchbyi

Geological Range

Vascoceras birchbyi Zone: Lower Turonian 93.48 ± 0.58

Cenomanian to Turonian

Paleogeographic Distribution

New Mexico to Colorado

Stratigraphic Occurrences

Turonian
Colorado Shale (NM)
Greenhorn Limestone (CO)
Greenhorn Limestone (Bridge Creek Member) (CO)
Cenomanian
Bridge Creek (CO)
Unknown Stage
Greenhorn Limestone (CO)
Niobrara Formation (CO)
Niobrara Formation (Smoky Hill Mbr) (KS)
Holotype of <i>Vascoceras birchbyi</i> (USNM 164022). Original unmodified images provided by courtesy of the Smithsonian NMNH and adapted and presented here under a Creative Commons BY-NC 4.0 license (NMNH GUID http://n2t.net/ark:/65665/34f93ab0c-be27-4c16-a443-fbc58c2fb8d7).
Holotype of Vascoceras birchbyi (USNM 164022). Original unmodified images provided by courtesy of the Smithsonian NMNH and adapted and presented here under a Creative Commons BY-NC 4.0 license (NMNH GUID http://n2t.net/ark:/65665/34f93ab0c-be27-4c16-a443-fbc58c2fb8d7).
<i>Vascoceras birchbyi</i> (FHSM 1416a).
Vascoceras birchbyi (FHSM 1416a).
Stratigraphic position unknown
Stratigraphic position unknown