[F] Willow Creek Formation - Alberta - Canada
Alberta - Canada
Variegated mudstone with some thin beds of sandstone. Upper part of the Willow Creek Formation is bright reddish-brown mudstone in beds as thick as 3 feet interbedded with gray, gray-green, and tan-gray mudstone (Mudge and Earhart, 1983). Lower part of Willow Creek Formation is variegated mudstone, dominantly grayish, green, gray, and locally tan, pinkish gray, purple, and red brown. Some thin interbeds contain irregular tufa-like nodules that probably contain barite. Thin, gray, poorly sorted fine- to medium-grained sandstone beds locally. Weathers to badlands topography where outcrops are extensive. At least 770 feet thick in north part of mapped area (Cannon, 1996).
Source: Berg (2002) Geologic Map of the Cut Bank 30\\\' x 60\\\' Quadrangle Norhwestern Montana
Tyrannosaurus rex - Tyrannosauria Tyrannosauridae - Cretaceous Late Maastrichtian
?Leptoceratops sp. - Ceratopia Protoceratopidae - Cretaceous Late Maastrichtian
Hadrosaurid indet. - Ornithopoda - Cretaceous Late Maastrichtian
Tyrannosaurid indet - Tyrannosauria Tyrannosauridae - Cretaceous Late Maastrichtian