Where: Johnson County, Texas (32.5° N, 97.3° W: paleocoordinates 31.0° N, 62.1° 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 175162: authorized by Matthew Clapham, entered by Matthew Clapham on 03.12.2015

Creative Commons license: CC BY (attribution)