Earth:Hatchetigbee Bluff Formation

Short description: Geologic formation in the southern United States

Hatchetigbee Bluff Formation Stratigraphic range: Ypresian (Wasatchian) ~55–50 Ma PreЄ Є O S D C P T J K Pg N ↓
Type	Formation
Unit of	Wilcox Group
Sub-units	Bashi Member
Lithology
Primary	Marl, sandstone
Other	Shale, siltstone
Location
Coordinates
Paleocoordinates	[ ⚑ ] 33.1°N 71.7°W / 33.1; -71.7
Region	Alabama Georgia (U.S. state) Louisiana Mississippi
Country	United States
Extent	Gulf of Mexico Basin
Type section
Named for	Hatchetigbee Bluff, Tombigbee River, Washington County, Alabama
Named by	Smith & Johnson
Year defined	1887
Hatchetigbee Bluff Formation (the United States) Hatchetigbee Bluff Formation (Alabama)

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. The formation is named for Hatchetigbee Bluff on the Tombigbee River, Washington County, Alabama.

Wasatchian correlations

Wasatchian correlations in North America

Basin	Powder River Uinta Piceance Colorado Plateau Wind River Green River Bighorn	Piceance	Colorado Plateau	Wind River	Green River	Bighorn		Williston	Okanagan	Princeton	Buck Creek	Nechako	Sverdrup	Potomac	GoM	Laguna Salada	Rio Grande	North Park	Raton	Galisteo	San Juan	Hatchetigbee Bluff Formation (North America)
Country	United States								Canada					United States		Mexico	United States
Copelemur	14px	14px					14px														14px
Coryphodon	14px	14px		14px			14px	14px					14px		14px		14px			14px	14px
Diacodexis	14px	14px			14px		14px	14px								14px					14px
Homogalax	14px	14px		14px			14px	14px						14px						14px
Oxyaena	14px	14px					14px									14px					14px
Paramys	14px	14px		14px	14px		14px	14px					14px				14px				14px
Primates	10px			10px			10px						10px				10px			10px	10px
Birds	10px								10px	10px			10px	10px
Reptiles	10px		10px					10px					10px	10px		10px					10px
Fish	10px		10px					10px		10px			10px	10px		10px
Insects								10px	10px	10px	10px	10px						10px
Flora	10px					10px	10px	10px	10px	10px				10px		10px		10px
Environments	Alluvial-fluvio-lacustrine	Fluvial				Fluvial	Fluvio-lacustrine	Fluvial	Lacustrine		Fluvio-lacustrine		Deltaic-paludal	Shallow marine		Fluvial	Shallow marine	Fluvial		Fluvial		Wasatchian volcanoclastics 8px Wasatchian fauna Wasatchian flora
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

• Sessa, J. A.; T. J. Bralower; M. E. Patzkowsky; J. C. Handley, and L. C. Ivany. 2012. Environmental and biological controls on the diversity and ecology of Late Cretaceous through early Paleogene marine ecosystems in the US Gulf Coastal Plain. Paleobiology 38. 218–239.
• Dockery, D. T. 1980. Invertebrate Macropaleontolgy of the Clarke County Mississippi Area. Bulletin - Mississippi Geological, Economic and Topographic Survey 122. ..
• Hansen, T. A. 1978. Ecological control of evolutionary rates in Paleocene - Eocene marine molluscs - Ph.D. thesis, 1–310. Yale University.
• Toulmin, L. D. 1977. Stratigraphic Distribution of Paleocene and Eocene Fossils in the Eastern Gulf Coast Region. Geological Survey of Alabama, Monograph 13. 1–602.
• Palmer, K. V., and D. C. Brann. 1965. Catalogue of the Paleocene and Eocene mollusca of the southern and eastern United States. Part 1. Pelecypoda, Amphineura, Peteropoda, Scaphopoda and Cephalopoda. Bulletins of American Paleontology 48. 1–471.
• Aldrich, T. H. 1921. New Eocene species from Alabama. Bulletins of American Paleontology 9. ..

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.