Also known as Davenport Ranch, WPA, Work Project No. 15087

Where: Medina County, Texas (29.6° N, 99.1° W: paleocoordinates 27.6° N, 57.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• upper Glen Rose Limestone

•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: peritidal; dolomitic lime mudstone and mudstone

Size class: macrofossils

Preservation: mold/impression, trace

Collected by WPA, R. T. Bird in 1940; reposited in the TMM

Collection methods: surface (in situ),

• Discovered by R.T. BIrd in 1940

Primary reference: Anonymous. 1940. The fourth quarterly report covering the quarter ending March 31, 1940 for the state-wide paleontologic-mineralogic survey in Texas. A Federal Works Agency Work Projects Administration Project. O.P. No. 665-66-3-233. State Serial No. 300-88 1-29 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 52148: authorized by Matthew Carrano, entered by Kaitlin Maguire on 27.07.2005, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)