Hannold Hill Formation

The Hannold Hill Formation is an Early Eocene (Wasatchian) geologic unit in the western United States.[1] It preserves the fossilized remains of the ray Myliobatis and gar.[2]

Hannold Hill Formation
Stratigraphic range: Wasatchian
55.8–50 Ma
TypeGeological formation
Unit ofBig Bend Group
Location
Coordinates29.4°N 103.1°W / 29.4; -103.1
Approximate paleocoordinates33.7°N 89.0°W / 33.7; -89.0
RegionTexas
Country United States
Type section
Named forHannold Hill
Hannold Hill Formation (the United States)
Hannold Hill Formation (Texas)

Fossil content

The following fossils have been reported from the formation:[1]

Glires
Pantodonta
Perissodactyla
Placentalia
Primates
  • Phenacolemurinae indet.[4]

Wasatchian correlations
Wasatchian correlations in North America
FormationWasatchDeBequeClaronIndian MeadowsPass PeakTatmanWillwoodGolden ValleyColdwaterAllenbyKamloopsOotsa LakeMargaretNanjemoyHatchetigbeeTetas de CabraHannold HillCoalmontCucharaGalisteoSan JoseYpresian (IUCS) • Itaboraian (SALMA)
Bumbanian (ALMA) • Mangaorapan (NZ)
BasinPowder River
Uinta
Piceance
Colorado Plateau
Wind River
Green River
Bighorn		Piceance




Colorado Plateau





Wind River





Green River






Bighorn		WillistonOkanaganPrincetonBuck CreekNechakoSverdrupPotomacGoMLaguna SaladaRio GrandeNorth ParkRatonGalisteoSan Juan
Hannold Hill Formation (North America)
Country United States Canada United States Mexico United States
Copelemur
Coryphodon
Diacodexis
Homogalax
Oxyaena
Paramys
Primates
Birds
Reptiles
Fish
Insects
Flora
EnvironmentsAlluvial-fluvio-lacustrineFluvialFluvialFluvio-lacustrineFluvialLacustrineFluvio-lacustrineDeltaic-paludalShallow marineFluvialShallow marineFluvialFluvial
Wasatchian volcanoclastics

Wasatchian fauna

Wasatchian flora
VolcanicYesNoYesNoYesNoYesNoYesNo

References
  1. Hannold Hill Formation at Fossilworks.org
  2. "Big Bend National Park," Hunt, Santucci, and Kenworthy, 2006, p.66
  3. Lucas, 1998
  4. Alroy, 2002
  5. Wilson, 1967

Bibliography
  • Hunt, ReBecca K., Vincent L. Santucci and Jason Kenworthy. 2006. "A preliminary inventory of fossil fish from National Park Service units." in S.G. Lucas, J.A. Spielmann, P.M. Hester, J.P. Kenworthy, and V.L. Santucci (ed.s), Fossils from Federal Lands. New Mexico Museum of Natural History and Science Bulletin 34, pp. 63–69
  • Alroy, J. 2002. Synonymies and reidentifications of North American fossil mammals, .. _.
  • Lucas, S. G. 1989. Coryphodon (Mammalia, Pantodonta) from the Hannold Hill Formation, Eocene of Trans-Pecos Texas. Pearce-Sellards Series 46. ..
  • J. A. Schiebout and Et al. 1987. Stratigraphy of the Cretaceous-Tertiary and Paleocene-Eocene Transition Rocks of Big Bend National Park, Texas . Journal of Geology 95
  • J. A. Wilson. 1967. Early Tertiary mammals. In R. A. Maxwell, J. T. Lonsdale, R. T. Hazzard, & J. A. Wilson (eds.), Geology of Big Bend National Park, Brewster County, Texas. The University of Texas Publication 6711:157-169
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