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Hell Creek Formation (MTKhc;0)
Geologic Formation
in
MT
,
ND
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Lithology
Shale
Sandstone
Bentonite
Geologic Age
Campanian – Maastrichtian (83.8 Ma – 66 Ma ago)
Geologic Unit Label
Khc
Light gray, bentonitic claystone that alternates with gray to brown sandstone interbedded with carbonaceous shale. Laterally equivalent to Lance Formation. Fluvial and flood plain. Thickness as much as 335 m (1,100 ft).
—
USGS
Fossils
Chordate Fossil
Chordata (phylum),
“Chordates”
43
Observations
Reptile Fossil
Reptilia (class),
“Reptiles”
26
Observations
Gar Fossil
Lepisosteidae (family)
25
Observations
Ceratopsidae
FAMILY
17
Observations
Protolambda
GENUS
17
Observations
See All
Taxonomy
Geographic Places
307
Geological Feature
46
Geologic Formation
Classified As
Geologic Formation
Hell Creek Formation (MTKhc;0)
Hell Creek Formation (MTKhc;0)
Hell Creek Formation (MTKhc;0)
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