Willow Creek Formation
Geological formation in Alberta, Canada / From Wikipedia, the free encyclopedia
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The Willow Creek Formation is a stratigraphic unit of Late Cretaceous to Early Paleocene age in the Western Canada Sedimentary Basin of southwestern Alberta.[2] It was first described by George Mercer Dawson in 1883 along the Willow Creek, a tributary of the Oldman River. Williams and Dyer defined the type section in 1930 at the mouth of Willow Creek, east of Fort Macleod.[3]
Quick Facts Type, Underlies ...
Willow Creek Formation | |
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Stratigraphic range: Late Cretaceous–Paleocene | |
Type | Geological formation |
Underlies | Porcupine Hills Formation |
Overlies | St. Mary River Formation |
Lithology | |
Primary | Shale, sandstone |
Location | |
Coordinates | 49.77208°N 113.36920°W / 49.77208; -113.36920 (Willow Creek Formation) |
Approximate paleocoordinates | 57.6°N 87.1°W / 57.6; -87.1 |
Region | ![]() ![]() |
Country | ![]() ![]() |
Extent | Western Canada Sedimentary Basin |
Type section | |
Named for | Willow Creek |
Named by | G.M. Dawson[1] |
Year defined | 1883 |
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The formation straddles the Cretaceous-Paleogene (K-Pg) boundary, which divides it into an upper, Early Paleocene member and a lower, Late Cretaceous member.[4] Dinosaur remains are among the fossils that have been recovered from the Late Cretaceous portion.[5]