Emmitsburg quarry (footprints) (Triassic of the United States)

Where: Frederick County, Maryland (39.7° N, 77.3° W: paleocoordinates 14.1° N, 21.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Gettysburg Formation (Chatham Group), Norian (228.0 - 208.5 Ma)

• age and formation from geologic map of Maryland (1968). Reference gives age as Triassic-Jurassic and updated based on Carrano pers. commun.

Environment/lithology: terrestrial; silty sandstone

• firm, fine-grained shaly sandstone of a dull greenish hue, and covered with sun cracks. The dip of the stratum is about 55 degrees north-west

Size class: macrofossils

Preservation: trace

Collected by J. Mitchell

Primary reference: J. A. Mitchell. 1895. The discovery of fossil tracks in the Newark System (Jura-Trias) of Frederick County, Maryland. The Johns Hopkins University Circulars 15(121):15-16 [J. Alroy/E. Leckey/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 35079: authorized by John Alroy, entered by Erin Leckey on 30.10.2003, edited by Matthew Carrano

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Theropoda - Grallatoridae
Grallator sp.
Grallator sp. Hitchcock 1858 theropod
numerous footprints