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Sheep Creek - middle, Sioux County, Nebraska, USA

FormationSheep Creek
Membermiddle
Age:20.4 - 16.0 Ma
Miocene
IntervalHemingfordian
Lithologysandstone
Number of Collections14
Number of Occurrences96

Recorded Sample Locations

LocationRegionStratigraphic Name
Bald ButteSioux County, Nebraska, USASheep Creek - middle
Target QuarrySioux County, Nebraska, USASheep Creek - middle

Associated Units

Stratigraphic NameAgeLithologyOccurrence Records
Brown Siltstone Beds30.8 - 20.4 Ma
Cenozoic
2
Brule33.3 - 30.8 Ma
Oligocene
sandstone162
Brule - lower Orella33.9 - 33.3 Ma
Oligocene
213
Brule - lower Whitney33.3 - 30.8 Ma
Oligocene
4
Brule - Orella33.9 - 33.3 Ma
Oligocene
135
Brule - Orella D33.9 - 33.3 Ma
Oligocene
47
Brule - upper30.8 - 20.4 Ma
Cenozoic
5
Brule - upper Whitney30.8 - 20.4 Ma
Cenozoic
36
Brule - Whitney30.8 - 20.4 Ma
Cenozoic
141
Brule - Whitney A33.3 - 30.8 Ma
Oligocene
16
Chadron37.2 - 33.9 Ma
Paleogene
claystone, "siliciclastic", "limestone", "volcaniclastic"132
Chadron - Big Cottonwood Creek37.2 - 33.9 Ma
Paleogene
siltstone174
Chadron - Peanut Peak37.2 - 33.3 Ma
Paleogene
85
Harrison24.8 - 20.4 Ma
Cenozoic
sandstone160
Monroe Creek26.3 - 20.4 Ma
Cenozoic
102
Olcott16.0 - 13.6 Ma
Miocene
109
Olcott - subcycle 120.4 - 16.0 Ma
Miocene
23
Olcott - subcycle 220.4 - 16.0 Ma
Miocene
44
Olcott - subcycle 320.4 - 16.0 Ma
Miocene
65
Runningwater20.4 - 16.0 Ma
Miocene
sandstone, sandstone/conglomerate315
Sheep Creek20.4 - 16.0 Ma
Miocene
sandstone/conglomerate29
Sheep Creek - lower20.4 - 16.0 Ma
Miocene
40
Snake Creek13.6 - 10.3 Ma
Miocene
4
Snake Creek - Johnson10.3 - 4.90 Ma
Neogene
51
Snake Creek - Laucomer13.6 - 10.3 Ma
Miocene
43
Snake Creek - Murphy13.6 - 10.3 Ma
Miocene
3
Snake Creek - subcycle 320.4 - 16.0 Ma
Miocene
3
Arikaree - Harrison23.0 - 5.33 Ma
Miocene
32
Arikaree - Harrison - Lower24.8 - 20.4 Ma
Cenozoic
47
Hemingford - Marsland24.8 - 20.4 Ma
Cenozoic
sandstone107
Hemingford - Marsland - Basal24.8 - 20.4 Ma
Cenozoic
sandstone44
White River - Brule33.9 - 33.3 Ma
Oligocene
25

Recorded Fossils

Accepted NameHierarchyAge
Neophrontops vetustus
species
7Animalia : Chordata : Aves : Accipitriformes : Accipitridae : Neophrontops : Neophrontops vetustus20.43 - 15.97 Ma
Miocene
Urubitinga enecta
species
7Animalia : Chordata : Aves : Accipitriformes : Accipitridae : Urubitinga : Urubitinga enecta20.43 - 15.97 Ma
Miocene
Burhinus lucorum
species
7Animalia : Chordata : Aves : Charadriiformes : Burhinidae : Burhinus : Burhinus lucorum20.43 - 15.97 Ma
Miocene
Pediohierax ramenta
species
7Animalia : Chordata : Aves : Falconiformes : Falconidae : Pediohierax : Pediohierax ramenta20.43 - 15.97 Ma
Miocene
Aramornis longurio
species
7Animalia : Chordata : Aves : Gruiformes : Aramidae : Aramornis : Aramornis longurio20.43 - 15.97 Ma
Miocene
Conuropsis fratercula
species
7Animalia : Chordata : Aves : Psittaciformes : Psittacidae : Conuropsis : Conuropsis fratercula20.43 - 15.97 Ma
Miocene
Merycodus minor
species
7Animalia : Chordata : Mammalia : Artiodactyla : Antilocapridae : Merycodus : Merycodus minor20.43 - 15.97 Ma
Miocene
Miolabis tenuis
species
7Animalia : Chordata : Mammalia : Artiodactyla : Camelidae : Paramiolabis : Miolabis tenuis20.43 - 15.97 Ma
Miocene
Protolabis saxeus
species
7Animalia : Chordata : Mammalia : Artiodactyla : Camelidae : Protolabis : Protolabis saxeus20.43 - 15.97 Ma
Miocene
Parablastomeryx scotti
species
7Animalia : Chordata : Mammalia : Artiodactyla : Hypertragulidae : Pseudoparablastomeryx : Parablastomeryx scotti20.43 - 15.97 Ma
Miocene
Brachycrus buwaldi
species
7Animalia : Chordata : Mammalia : Artiodactyla : Merycoidodontidae : Brachycrus : Brachycrus buwaldi20.43 - 15.97 Ma
Miocene
Merychyus relictus
species
7Animalia : Chordata : Mammalia : Artiodactyla : Merycoidodontidae : Merychyus : Merychyus relictus20.43 - 15.97 Ma
Miocene
Blastomeryx gemmifer
species
7Animalia : Chordata : Mammalia : Artiodactyla : Moschidae : Blastomeryx : Blastomeryx gemmifer20.43 - 15.97 Ma
Miocene
Bouromeryx americanus
species
7Animalia : Chordata : Mammalia : Artiodactyla : Palaeomerycidae : Bouromeryx : Bouromeryx americanus20.43 - 15.97 Ma
Miocene
Blastomeryx riparius
species
7Animalia : Chordata : Mammalia : Artiodactyla : Palaeomerycidae : Sinclairomeryx : Blastomeryx riparius20.43 - 15.97 Ma
Miocene
Blastomeryx antilopinus
species
7Animalia : Chordata : Mammalia : Artiodactyla : Moschidae : Blastomeryx : Blastomeryx antilopinus20.43 - 15.97 Ma
Miocene
Lambdoceras sp.
genus
6Animalia : Chordata : Mammalia : Artiodactyla : Protoceratidae : Lambdoceras20.43 - 15.97 Ma
Miocene
Hesperhys vagrans
species
7Animalia : Chordata : Mammalia : Artiodactyla : Tayassuidae : Hesperhys : Hesperhys vagrans20.43 - 15.97 Ma
Miocene
Platygonus pollenae
species
7Animalia : Chordata : Mammalia : Artiodactyla : Tayassuidae : Platygonus : Platygonus pollenae20.43 - 15.97 Ma
Miocene
Prosthennops xiphodonticus
species
7Animalia : Chordata : Mammalia : Artiodactyla : Tayassuidae : Prosthennops : Prosthennops xiphodonticus20.43 - 15.97 Ma
Miocene
Amphicyon sp.
genus
6Animalia : Chordata : Mammalia : Carnivora : Amphicyonidae : Amphicyon20.43 - 15.97 Ma
Miocene
Amphicyon frendens
species
7Animalia : Chordata : Mammalia : Carnivora : Amphicyonidae : Amphicyon : Amphicyon frendens20.43 - 15.97 Ma
Miocene
Cynelos sp.
genus
6Animalia : Chordata : Mammalia : Carnivora : Amphicyonidae : Cynelos20.43 - 15.97 Ma
Miocene
Amphicyon idoneus
species
7Animalia : Chordata : Mammalia : Carnivora : Amphicyonidae : Cynelos : Amphicyon idoneus20.43 - 15.97 Ma
Miocene
Pliocyon sp.
genus
6Animalia : Chordata : Mammalia : Carnivora : Amphicyonidae : Pliocyon20.43 - 15.97 Ma
Miocene
Cynarctoides acridens
species
7Animalia : Chordata : Mammalia : Carnivora : Canidae : Cynarctoides : Cynarctoides acridens20.43 - 15.97 Ma
Miocene
Leptocyon leidyi
species
7Animalia : Chordata : Mammalia : Carnivora : Canidae : Leptocyon : Leptocyon leidyi20.43 - 15.97 Ma
Miocene
Osbornodon fricki
species
7Animalia : Chordata : Mammalia : Carnivora : Canidae : Osbornodon : Osbornodon fricki20.43 - 15.97 Ma
Miocene
Protomarctus optatus
species
7Animalia : Chordata : Mammalia : Carnivora : Canidae : Protomarctus : Protomarctus optatus20.43 - 15.97 Ma
Miocene
Felis intrepidus
species
7Animalia : Chordata : Mammalia : Carnivora : Felidae : Pseudaelurus : Felis intrepidus20.43 - 15.97 Ma
Miocene
Pseudaelurus validus
species
7Animalia : Chordata : Mammalia : Carnivora : Felidae : Pseudaelurus : Pseudaelurus validus20.43 - 15.97 Ma
Miocene
Brachypsalis matutinus
species
7Animalia : Chordata : Mammalia : Carnivora : Mustelidae : Brachypsalis : Brachypsalis matutinus20.43 - 15.97 Ma
Miocene
Dinogale siouxensis
species
7Animalia : Chordata : Mammalia : Carnivora : Mustelidae : Dinogale : Dinogale siouxensis20.43 - 15.97 Ma
Miocene
Mionictis letifer
species
7Animalia : Chordata : Mammalia : Carnivora : Mustelidae : Mionictis : Mionictis letifer20.43 - 15.97 Ma
Miocene
? no name ?
10020.43 - 15.97 Ma
Miocene
Archaeolaginae
subfamily
5.3Animalia : Chordata : Mammalia : Lagomorpha : Leporidae : Archaeolaginae20.43 - 15.97 Ma
Miocene
Chalicotheriidae
family
5Animalia : Chordata : Mammalia : Perissodactyla : Chalicotheriidae20.43 - 15.97 Ma
Miocene
Tylocephalonyx skinneri
species
7Animalia : Chordata : Mammalia : Perissodactyla : Chalicotheriidae : Tylocephalonyx : Tylocephalonyx skinneri20.43 - 15.97 Ma
Miocene
Acritohippus tertius
species
7Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Acritohippus : Acritohippus tertius20.43 - 15.97 Ma
Miocene
Archaeohippus penultimus
species
7Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Archaeohippus : Archaeohippus penultimus20.43 - 15.97 Ma
Miocene
Equinae
subfamily
5.3Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Hippodon : Equinae20.43 - 15.97 Ma
Miocene
Hypohippus sp.
genus
6Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Hypohippus20.43 - 15.97 Ma
Miocene
Merychippus primus
species
7Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Merychippus : Merychippus primus20.43 - 15.97 Ma
Miocene
? no name ?
10020.43 - 15.97 Ma
Miocene
Parahippus sp.
genus
6Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Parahippus20.43 - 15.97 Ma
Miocene
Aceratherium megalodum
species
7Animalia : Chordata : Mammalia : Perissodactyla : Rhinocerotidae : Aphelops : Aceratherium megalodum20.43 - 15.97 Ma
Miocene
Aceratherium profectum
species
7Animalia : Chordata : Mammalia : Perissodactyla : Rhinocerotidae : Peraceras : Aceratherium profectum20.43 - 15.97 Ma
Miocene
Brachypotherium americanum
species
7Animalia : Chordata : Mammalia : Perissodactyla : Rhinocerotidae : Teleoceras : Brachypotherium americanum20.43 - 15.97 Ma
Miocene
Alphagaulus vetus
species
7Animalia : Chordata : Mammalia : Rodentia : Mylagaulidae : Alphagaulus : Alphagaulus vetus20.43 - 15.97 Ma
Miocene
Galbreathia novellus
species
7Animalia : Chordata : Mammalia : Rodentia : Mylagaulidae : Galbreathia : Galbreathia novellus20.43 - 15.97 Ma
Miocene
Geochelone (Hesperotestudo) angusticeps
species
7Animalia : Chordata : Reptilia : Testudines : Testudinidae : Hesperotestudo : Geochelone (Hesperotestudo) angusticeps20.43 - 15.97 Ma
Miocene

References

Osborn H. F. (1918) Equidae of the Oligocene, Miocene, and Pliocene of North America, iconographic type revision, Memoirs of the American Museum of Natural History 2 1, 1-217
Wetmore A. (1926) An additional record for the fossil hawk Urubitinga necta, American Museum Novitates 241, 1-3
Wetmore A. (1926) Descriptions of additional fossil birds from the Miocene of Nebraska, American Museum Novitates 211, 1-5
Matthew W. D. (1932) New fossil mammals from the Snake Creek Quarries, American Museum Novitates 540, 1-8
Frick C. (1937) Horned ruminants of North America, Bulletin of the American Museum of Natural History 69, 1-669
Wetmore A. (1943) Two more fossil hawks from the Miocene of Nebraska, Condor 45 6, 229-231
Schultz C. B., Falkenbach C. H. (1947) Merychyinae, a subfamily of oreodonts, Bulletin of the American Museum of Natural History 88 4, 157-286
Dawson M. R. (1958) Later Tertiary Leoporidae of North America, University of Kansas Paleontological Contributions Vertebrata 6, 1-75
Skinner M. F., Skinner S. M., et al (1977) Stratigraphy and biostratigraphy of late Cenozoic deposits in central Sioux County, western Nebraska, Bulletin of the American Museum of Natural History 158 5, 263-370
Coombs M. C. (1979) Tylocephalonyx, a new genus of North American dome-skulled chalicotheres (Mammalia, Perissodactyla), Bulletin of the American Museum of Natural History 164 1, 1-64
Bickart K. J. (1981) A new thick-knee, Burhinus, from the Miocene of Nebraska, with comments on the habitat requirements of the Burhinidae (Aves: Charadriiformes), Journal of Vertebrate Paleontology 1 3/4, 273-277
Becker J. J. (1987) Revision of "Falco" ramenta Wetmore and the Neogene evolution of the Falconidae, Auk 104 2, 270-276
Wright D. B., Eshelman R. E. (1987) Miocene Tayassuidae (Mammalia) From the Chesapeake Group of the Mid-Atlantic Coast and their Bearing on Marine-nonmarine correlation, Journal of Paleontology 61 3, 604-618
Wang X. (1994) Phylogenetic systematics of the Hesperocyoninae (Carnivora: Canidae), Bulletin of the American Museum of Natural History 221, 1-207
Hunt, Jr. R. M. (1998) Amphicyonidae, 196-227
Wang X., Tedford R. H., et al (1999) Phylogenetic systematics of the Borophaginae (Carnivora: Canidae), Bulletin of the American Museum of Natural History 243, 1-392
Rothwell T. M. (2001) A Partial Skeleton of Pseudaelurus (Carnivora: Felidae) from the Nambé Member of the Tesuque Formation, Española Basin, New Mexico, American Museum Novitates 3342, 1-31 doi:10.1206/0003-0082(2001)342<0001:APSOPC>2.0.CO;2
Alroy J. (2002) Synonymies and reidentifications of North American fossil mammals
Liter M., Prothero D. (2003) New dromomerycids (Mammalia: Artiodactyla) from the middle Miocene Sharktooth Hill Bonebed, California, and the systematics of the cranioceratinins, Journal of Vertebrate Paleontology 23 3, 72A
Rothwell T. (2004) Chapter 12: New felid material from the Ulaan Tologoi Locality, Loh Formation (early Miocene) of Mongolia, Bulletin of the American Museum of Natural History 285 1, 157-165
Prothero D. R. (2005) The Evolution of North American Rhinoceroses, 1-218
Tedford R. H., Wang X., et al (2009) Phylogenetic Systematics of the North American Fossil Caninae (Carnivora: Canidae), Bulletin of the American Museum of Natural History 325, 1-218 doi:10.1206/574.1
Mihlbachler M. C., Rivals F., et al (2011) Dietary Change and Evolution of Horses in North America, Science 331, 1178-1181 doi:10.1126/science.1196166
Prothero D. R., Grenader J. (2012) A New Primitive Species of the Flat-Headed Peccary Platygonus (Tayassuidae, Artiodactyla, Mammalia) from the Late Miocene of the High Plains, Journal of Paleontology 86 6, 1021-1031 doi:10.1666/12-050R.1
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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