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Rock Formations

Measure

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Topo

Ecoregions

Public Lands

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BASEMAPS

Default Weather

Temperature

Smoke

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WEATHER

Tullock Member of Fort Union Formation (MTTft;0)

Geologic Formation in MT

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Lithology

Geologic Age

Danian (66 Ma – 61.6 Ma ago)

Geologic Unit Label

Tft

Yellow sandstone interbedded with subordinate grayish brown and black shale and thin beds of coal. Alluvial plain. Thickness as much as 180 m (590 ft).

— USGS

Chordate Fossil Chordata (phylum), “Chordates”

10 Observations

Mudpuppy Fossil Proteidae (family)

Dromaeosauridae FAMILY · “Dromaeosaur Family”, “Raptor”, “Dromaeosaur”

Meniscoessus GENUS

Protolambda GENUS

Taxonomy

Geographic Places

Geological Feature

Geologic Formation

Classified As

Geologic Formation

Tullock Member of Fort Union Formation (MTTft;0)

Tullock Member of Fort Union Formation (MTTft;0)

Tullock Member of Fort Union Formation (MTTft;0)