Graterford tracksite (Triassic of the United States)

Also known as SMP locality 164

Where: Montgomery County, Pennsylvania (40.2° N, 75.4° W: paleocoordinates 14.7° N, 20.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Graters Member (Passaic Formation), Norian (228.0 - 208.5 Ma)

• orig. assigned to Lockatong Fm.; now lower part of Graters Mbr., Passaic Fm.

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; gray siliciclastic sediments

• "a few of the footprints are superimposed on preserved mudcracks and ripple marks"

Size class: macrofossils

Preservation: cast, mold/impression, trace

Collected by W. Covington in 1993

Collection methods: bulk, quarrying, mechanical,

• Discovered by Wayne Covington, inmate at the State Correctional Institution at Graterford

Primary reference: R. M. Sullivan, K. Randall, M. Hendricks and W. E. Kochanov. 1994. The Graterford dinosaurs: tracking Triassic travelers. Pennsylvania Geology 25(4):2-9 [M. Carrano/K. Maguire/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 54144: authorized by Matthew Carrano, entered by Kaitlin Maguire on 23.09.2005, 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., "Atreipus milfordensis" = Grallator tuberosus
Grallator sp. Hitchcock 1858 theropod
Grallator sp. Hitchcock 1858 theropod
SMP VP 161, 171, 186
"Atreipus milfordensis" = Grallator tuberosus Hitchcock 1836 theropod
SMP VP 158-186, 522-523, 531, 536, 541, 544, 547, 551-552, 554, 556-558, 564-565, 567, 757
 Pseudosuchia - Chirotheriidae
cf. Brachychirotherium sp.
cf. Brachychirotherium sp. Beurlen 1950 archosaur
SMP VP 175
 Squamata -
Rhynchosauroides sp.
Rhynchosauroides sp. Maidwell 1911 squamates
Gwyneddichnium or Rhynchosauroides