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Williams Fork Formation information


Williams Fork Formation
Stratigraphic range: Campanian (Edmontonian)
~73–70 Ma
PreꞒ
O
S
D
C
P
T
J
K
Pg
N
TypeGeological formation
Unit ofMesaverde Group
Lithology
PrimaryMudstone
OtherSandstone
Location
Coordinates40°00′N 108°48′W / 40.0°N 108.8°W / 40.0; -108.8
Approximate paleocoordinates47°30′N 80°18′W / 47.5°N 80.3°W / 47.5; -80.3
RegionColorado
CountryWilliams Fork Formation United States
Williams Fork Formation is located in the United States
Williams Fork Formation
Williams Fork Formation (the United States)
Williams Fork Formation is located in Colorado
Williams Fork Formation
Williams Fork Formation (Colorado)

The Williams Fork Formation is a Campanian to Maastrichtian (Edmontonian) geologic formation of the Mesaverde Group in Colorado. Dinosaur remains are among the fossils that have been recovered from the formation, most notably Pentaceratops sternbergii,[1]. Other fossils found in the formation are the ammonite Lewyites, tyrannosaurids, dromaeosaurids, troodontids, nodosaurids, ankylosaurids, hadrosaurids, hybodonts, neosuchian crocodylomorphs, and the mammals Glasbius and Meniscoessus collomensis.[2][3]

  1. ^ Diem, Steve; Archibald, James D. (2005). "Range extension of southern chasmosaurine Ceratopsian dinosaurs into northwestern Colorado". Journal of Paleontology. 79 (2): 251–258. CiteSeerX 10.1.1.538.7263. doi:10.1666/0022-3360(2005)079<0251:REOSCC>2.0.CO;2. S2CID 17715685. Retrieved 21 September 2016.
  2. ^ Jubb Creek at Fossilworks.org
  3. ^ Rangely South (SDNHM) at Fossilworks.org

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