San Francisco Creek, 22 m below base of Boquillas Fm [Buda Limestone] (Cretaceous of the United States)

Where: Brewster County, Texas (29.9° N, 102.3° W: paleocoordinates 29.5° N, 67.7° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Buda Limestone Formation, Early/Lower Cenomanian (99.6 - 93.5 Ma)

• STRATIGRAPHIC RELATIONS: From the Buda Limestone, which overlies the Del Rio Fm (Cenomanian), and is correlative with the Grasyon Fm. AGE: Early Cenomanian, on the basis of ammonite biostratigraphy. STRATIGRAPHIC POSITION: From 22 m below base of Boquillas Fm.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified limestone

• ENVIRONMENT: Not discussed in text.
• SPECIFIC LITHOLOGY: Limestone. LITHIFICATION: Lithified, on the basis of figured specimens.

Size class: macrofossils

Collected by Perkins

• COLLECTOR: B. F. Perkins. REPOSITORY: UT and WSA.

Primary reference: K. Young. 1979. Lower Cenomanian and Late Albian (Cretaceous) ammonites, especially Lyelliceridae, or Texas and Mexico. Texas Memorial Museum Bulletin 26:1-99 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 88728: authorized by Austin Hendy, entered by Austin Hendy on 19.04.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for ammonoids. NOMENCLATURE: Authoritative publication, with relatively modern nomenclature and species-resolution identifications.
Show authors, comments, and common names
Cephalopoda
 Ammonitida - Lyelliceratidae
Budaiceras elegantior
Budaiceras elegantior Lasswitz 1904 ammonite