Hatchetigbee Bluff Formation Explained

Hatchetigbee Bluff Formation
Type:	Formation
Age:	Ypresian (Wasatchian) ~
Period:	Ypresian
Prilithology:	Marl, sandstone
Otherlithology:	Shale, siltstone
Namedfor:	Hatchetigbee Bluff, Tombigbee River, Washington County, Alabama
Namedby:	Smith & Johnson
Year Ts:	1887
Region:	Mississippi
Coordinates:	31.3°N -86.1°W
Paleocoordinates:	33.1°N -71.7°W
Unitof:	Wilcox Group
Subunits:	Bashi Member
Extent:	Gulf of Mexico Basin

The Hatchetigbee Bluff Formation is a geologic formation in Alabama, Georgia, Louisiana and Mississippi. The youngest unit of the Wilcox Group preserves fossils dating back to the Ypresian stage of the Eocene period, or Wasatchian in the NALMA classification.^[1] The formation is named for Hatchetigbee Bluff on the Tombigbee River, Washington County, Alabama.^[2]

Wasatchian correlations

Wasatchian correlations in North America

Formation															Hatchetigbee							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 Alabama
• List of fossiliferous stratigraphic units in Georgia (U.S. state)
• List of fossiliferous stratigraphic units in Louisiana
• List of fossiliferous stratigraphic units in Mississippi
• Paleontology in Alabama
• Paleontology in Georgia (U.S. state)
• Paleontology in Louisiana
• Paleontology in Mississippi

References

Bibliography

Further reading

• Smith, E.A., and Johnson, L.C., 1887, Tertiary and Cretaceous strata of the Tuscaloosa, Tombigbee, and Alabama Rivers: U.S. Geological Survey Bulletin, 43, 189 p.

Notes and References

1. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=&formation=Hatchetigbee%20Bluff&group_formation_member=Hatchetigbee%20Bluff Hatchetigbee Bluff Formation
2. https://ngmdb.usgs.gov/Geolex/UnitRefs/HatchetigbeeRefs_2004.html Hatchetigbee Bluff Formation