Talley Mountain (LSU) (Cretaceous of the United States)

Where: Brewster County, Texas (29.2° N, 103.2° W: paleocoordinates 35.6° N, 76.7° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Upper Shale Member (Aguja Formation), Judithian (83.5 - 70.6 Ma)

• Multiple sites from above WPA quarry level - five horizons

• group of beds-level stratigraphic resolution

Environment/lithology: channel lag; paleosol/pedogenic, intraclastic, sandy conglomerate

• "lag deposits from the base of fluvial channels"
• "carbonate-cemented, pedogenic-nodule, sandstone conglomerates containing numerous clasts of clay, pedogenic nodules..."

Size class: mesofossils

Collection methods: bulk, sieve,

Primary reference: J. T. Sankey. 1998. Vertebrate paleontology and magnetostratigraphy, upper Aguja Formation (late Campanian), Big Bend National Park, Texas. Journal of Vertebrate Paleontology 18(3, suppl.):75A [J. Alroy/J. Alroy/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 14488: authorized by John Alroy, entered by John Alroy on 21.09.1998, edited by Jason Head and Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

• from five "horizons" in a 20 m intervallocal paleomagnetic section fails to include any independent tie point; said to be "upper Campanian"
Reptilia
 Ornithischia - Ceratopsidae
Ceratopsidae indet. Marsh 1888 ceratopsid
 Ornithischia - Pachycephalosauridae
Pachycephalosauridae indet.1 Sternberg 1945 ornithischian
 Ornithischia - Hadrosauridae
Hadrosauridae indet. Cope 1869 hadrosaurid
 Theropoda - Dromaeosauridae
Richardoestesia cf. gilmorei Currie et al. 1990 maniraptoran
Richardoestesia isosceles Sankey 2001 maniraptoran
Saurornitholestes cf. langstoni Sues 1978 maniraptoran
 Theropoda - Tyrannosauridae
Tyrannosauridae indet. Osborn 1906 tyrannosaurid
Mammalia
 Theriamorpha - Alphadontidae
Alphadon sp.2 Simpson 1927 metatherian
LSUMG 492:6252
Alphadon cf. halleyi Sahni 1972 metatherian
includes "A. cf. sahnii"
 Multituberculata -
Cimexomys sp.2 Sloan and Van Valen 1965 multituberculate
LSUMG 140:6121
 Multituberculata - Neoplagiaulacidae
Mesodma sp.2 Jepsen 1940 multituberculate
LSUMG 491:5779
 Multituberculata - Cimolomyidae
Meniscoessus sp. Cope 1882 multituberculate
Cimolomys sp. Marsh 1889 multituberculate
LSUMG 489:5681
 Multituberculata -
cf. Paracimexomys sp.2 Archibald 1982 multituberculate
LSUMG 489:5684, 491:5778