Blackleaf Formation

Blackleaf Formation
Stratigraphic range: late Albian-Cenomanian
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TypeFormation
Unit ofColorado Group
Lithology
PrimaryMudstone, sandstone
OtherShale, siltstone
Location
Coordinates44°30′N 112°36′W / 44.5°N 112.6°W / 44.5; -112.6
Approximate paleocoordinates45°54′N 72°18′W / 45.9°N 72.3°W / 45.9; -72.3
RegionMontana
CountryUnited States
Blackleaf Formation (the United States)
Blackleaf Formation (Montana)

The Blackleaf Formation is a geologic formation in Montana. It preserves fossils dating back to the Albian to Cenomanian stages of the Cretaceous period.

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