Where: Grayson County, Texas (33.8° N, 96.7° W: paleocoordinates 32.0° N, 61.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Grayson Marl Formation, Early/Lower Cenomanian (99.6 - 93.5 Ma)

• Lower lower Cenomanian

• bed-level stratigraphic resolution

Environment/lithology: lithified marl

Size class: macrofossils

Reposited in the USNM

Primary reference: W. J. Kennedy, W. A. Cobban, J. M. Hancock and W. S. Gale. 2005. Upper Albian and Lower Cenomanian ammonites from the Main Street Limestone, Grayson Marl and Del Rio Clay in northeast Texas. Cretaceous Research 26:349-428 [L. Bulot/L. Bulot/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 175200: authorized by Matthew Clapham, entered by Matthew Clapham on 04.12.2015

Creative Commons license: CC BY (attribution)