Approximately 4,210 feet of Late Cretaceous and 1,440 feet of Tertiary sedimentary rocks are exposed in the Salt Wells Anticline area of southcentral Sweetwater County, Wyoming. Late Cretaceous units include the Blair, Rock Springs, Ericson, and Almond Formations of the Mesaverde Group and the Lewis Shale; Tertiary units include the...
Over 10,000 feet of marine and nonmarine Late Cretaceous sedimentary rocks are exposed within a 110 square mile area in northeastern Teton County, Wyoming. An additional 1400 feet of nonmarine Paleocene and Miocene rocks overlie these. Landslide deposits and Pleistocene glacial moraine cover over one-half of the area. The Late...
The Garnet Range-Bearmouth area of western Montana was the
depositional site for basinal, platform slope, shelf, and
peritidal Mississippian carbonate rocks. The following
stratigraphic units, listed in ascending order, are recognized:
the Paine Limestone, Middle Canyon Formation, Mission Canyon
Limestone, and McKenzie Canyon Limestone of the Tendoy Group; the
Kibbey...
The bedrock of Thetis, Kuper, and seven adjacent islands and
islets of British Columbia's Gulf Islands consists of four Late Cretaceous
(Campanian) formations of the Nanaimo Group. The four, from
oldest to youngest, are the Cedar District, De Courcy, Northumberland,
and Geoffrey Formations.
The formations vary greatly in thickness but...