Comanche Peak Power Plant, Glen Rose (SMU) (Cretaceous of the United States)

Where: Somervell County, Texas (32.3° N, 97.7° W: paleocoordinates 29.9° N, 55.6° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Glen Rose Limestone Formation (Trinity Group), Early/Lower Albian (112.0 - 109.0 Ma)

• The Glen Rose formation spans through four ammonite zones with ages between latest Aptian and early Albian. Young 1974 suggested the Kasanskyella spathi ammonite zone is latest aptian, the Hypacanthoplites cragini zone is earliest Albian, the Douvilleiceras mammillatum and Hypacanthoplites comalensis zones are early Albian and may extend into the middle Albian. The Salenia texana Zone and Corbula bed fall within the mammillatum zone. The benthic foraminifera Orbitolina texana also suggests a late aptian - early albian age and is found in basal levels and in the upper member (Stricklin et al. 1971). Scott et al. (2007) estimated that the age of the Glen Rose Formation ranges from 113.3 to 108.0 Ma.

• bed-level stratigraphic resolution

Environment/lithology: lithified, gray lime mudstone

• "within a grey, relatively well-indurated fossiliferous marine micritic limestone."

Size class: macrofossils

Preservation: mold/impression

Collected by V. Mills in 1977

Collection methods: quarrying,

• collected by Vernon Mills of Stephenville, TX.

Primary reference: P. A. Murry, D. A. Winkler, and L. L. Jacobs. 1991. An azhdarchid pterosaur humerus from the Lower Cretaceous Glen Rose Formation of Texas. Journal of Paleontology 65(1):167-170 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 84273: authorized by Matthew Carrano, entered by Matthew Carrano on 02.10.2008, edited by Richard Butler and Graeme Lloyd

Creative Commons license: CC BY (attribution)

Taxonomic list

• "The matrix contains carbonized wood fragments, plant cuticles, numerous ostracodes, and isolated bones, fish teeth, and scales. In immediate association was a carbonized log, the impression of which is preserved in one of the limestone blocks collected by Mills."
unclassified
  -
Plantae indet. Haeckel 1866
carbonized log
Deuteropoda
  -
Ostracoda indet. Latreille 1802 ostracod
Gnathostomata
  -
Reptilia
 Pterosauria -
Radiodactylus langstoni n. gen. n. sp.
Radiodactylus langstoni n. gen. n. sp. Andres and Myers 2013 pterosaur
SMU 72547, humerus