Tatman Formation Explained

Tatman Formation
Type:	Formation
Age:	Ypresian (Lostcabinian) ~
Period:	Ypresian
Prilithology:	Shale
Region:	Wyoming
Coordinates:	44.2°N -108.6°W
Paleocoordinates:	49°N -91.5°W
Extent:	Bighorn Basin

The Tatman Formation is a Wasatchian geologic formation in Wyoming. It preserves fossils dating back to the Ypresian stage of the Eocene period.^[1]

Fossil content

The following fossils have been recovered from the formation:^{[1] [2]}

Flora

• Allantoidiopsis erosa
• Cercidiphyllum genetrix
• Cnemidaria magna
• Dombeya novimundi
• Eugenia americana
• Lygodium kaulfussi
• Platanus wyomingensis
• Platycarya castaneopsis
• Populus meigsii
• Salvinia preauriculata
• Thelypteris iddingsii
• Zingiberopsis isonervosa
• Alnus sp.
• Equisetum sp.
• aff. Typha sp.
• Alismataceae indet.
• Monocotyledoneae indet.

Wasatchian correlations

Wasatchian correlations in North America

Formation						Tatman																Ypresian (IUCS) • Itaboraian (SALMA) Bumbanian (ALMA) • Mangaorapan (NZ)
Basin		Piceance	Colorado Plateau	Wind River	Green River																	align=center rowspan=14
Copelemur	align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center
Coryphodon	align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center
Diacodexis	align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center
Homogalax	align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center
Oxyaena	align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center
Paramys	align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center
Primates	align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center
Birds	align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center
Reptiles	align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center
	align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center
Insects	align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center
	align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center		align=center
	Alluvial-fluvio-lacustrine	Fluvial				Fluvial	Fluvio-lacustrine	Fluvial	Lacustrine		Fluvio-lacustrine		Deltaic-paludal	Shallow marine		Fluvial	Shallow marine	Fluvial		Fluvial
Volcanic	Yes	No							Yes	No	Yes	No	Yes	No						Yes	No

See also

• List of fossiliferous stratigraphic units in Wyoming
• Paleontology in Wyoming
• Wasatch Formation
• Willwood Formation

References

Bibliography

Notes and References

1. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Tatman&group_formation_member=Tatman Tatman Formation
2. Wing et al., 1995