TMM 41361, Tornillo Flat, Big Bend NP (Cretaceous of the United States)

Where: Brewster County, Texas (29.4° N, 103.2° W: paleocoordinates 36.2° N, 82.0° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Javelina Formation (Tornillo Group), Maastrichtian (72.1 - 66.0 Ma)

• "lower third of the Tornillo Group"

• bed-level stratigraphic resolution

Environment/lithology: fine channel fill; sandstone and lenticular, concretionary, green mudstone

• "uppermost part of a stream channel bar deposit...water-saturated reducing conditions existed at the site...probably represents an abandoned channel deposit that formed after a reach of stream channel was cut off from active flow."
• "a lens of dark olive-colored mudstone of limited lateral extent...The high organic matter content, ferroan calcite nodules, and similar coatings that occur on the bones..."

Size class: macrofossils

Collected by W. Langston Jr. in 1970; reposited in the TMM

Primary reference: R. K. Hunt and T. M. Lehman. 2008. Attributes of the ceratopsian dinosaur Torosaurus, and new material from the Javelina Formation (Maastrichtian) of Texas. Journal of Paleontology 82(6):1127-1138 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 85188: authorized by Matthew Carrano, entered by Matthew Carrano on 05.12.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Actinopteri
 Lepisosteiformes - Lepisosteidae
Lepisosteidae indet. Cuvier 1825 gar
"gar scales"
Reptilia
 Testudines - Trionychidae
Trionychidae indet. Gray 1825 softshell turtle
 Neornithischia - Ceratopsidae
Torosaurus cf. utahensis Gilmore 1946 ceratopsid
MNI; 37 elements: TMM 41361-1 to -37; 1 juvenile and 2 adults