Wade Quarry (Miocene of the United States)

Where: Cherry County, Nebraska (42.8° N, 100.8° W: paleocoordinates 43.3° N, 98.2° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Merritt Dam Member (Ash Hollow Formation), Clarendonian (13.6 - 10.3 Ma)

Environment/lithology: terrestrial

Primary reference: M. F. Skinner and F. W. Johnson. 1984. Tertiary stratigraphy and the Frick Collection of fossil vertebrates from north-central Nebraska. Bulletin of the American Museum of Natural History 178(3):1-368 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 18447: authorized by John Alroy, entered by John Alroy on 05.08.1992, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• an ash at the quarry level may be equivalent to the Davis Ash, which in any case is 1) low in the Merritt Dam Mbr., 2) less than 2 mi downstream overlying Burge Quarry, and 3) no closer to any other Merritt Dam quarry (Skinner and Johnson 1984); therefore, I treat this as the fauna calibrated by the Davis Ash, which was dated at 9.7 +/- 1.2 Ma (FT zircon) and 7.5 +/- 2.2 and 10.2 +/- 0.7 Ma (FT on glass) by Skinner and Johnson, and again at 10.3 +/- 0.3 (FT on zircon) and 6.9 +/- 0.7 Ma (FT on glass) by Naeser et al. 1980; the glass dates are inconsistent, the zircon dates are not, and the 10.3 date, which seems to be a revision of the 9.7 date, seems best
164 F:AM specimens: Skinner and Johnson 1984
"Clarendonian peccary" sp.8
Machaerodus Quarry form; species "A" of Wright 1983
 Perissodactyla - Rhinocerotidae
Teleoceras major4 Hatcher 1894 rhinoceros
Aphelops megalodus4 Cope 1873 rhinoceros
 Perissodactyla - Tapiridae
Tapirus johnsoni6 Schultz et al. 1975 tapir
unnamed and unnumbered UNSM quarry that almost certainly is this locality based on coordinates and stratigraphy
 Perissodactyla - Equidae
Hipparion tehonense3 Merriam 1916 hipparionine horse
Calippus martini2 Hesse 1936 horse
pers. commun.
 Carnivora - Barbourofelidae
Barbourofelis morrisi Schultz et al. 1970 carnivoran
 Carnivora - Canidae
Epicyon saevus7 Leidy 1858 bone-crushing dog
Epicyon haydeni7 Leidy 1858 bone-crushing dog
Carpocyon robustus7 Green 1948 bone-crushing dog
 Ungulata - Merycoidodontidae
"Merychyus novomexicanus" = Ustatochoerus medius novomexicanus1
"Merychyus novomexicanus" = Ustatochoerus medius novomexicanus1 Frick 1929 oreodont
 Ungulata - Tayassuidae
Skinnerhyus shermerorum5 Prothero and Pollen 2013 peccary
Machaerodus Quarry form; species "A" of Wright 1983