Douglassville tracksite (Triassic of the United States)

Where: Berks County, Pennsylvania (40.3° N, 75.7° W: paleocoordinates 14.8° N, 20.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• two footprint-bearing beds

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine; siltstone and sandstone

• "bedded, oscillatory-rippled siltstones and very fine-grained sandstones with claystone partings"

Size class: macrofossils

Preservation: mold/impression, trace

Collected by S. Silvestri

Collection methods: surface (in situ),

Primary reference: P. E. Olsen. 1989. Stop 5.3: Douglasville footprint quarries. In P. E. Olsen, R. W. Schlische, & P. J. W. Gore (eds.), Tectonic, Depositional, and Paleoecological History of Early Mesozoic Rift Basins, Eastern North America. Gulf, North Carolina, USA to Parrsboro, Nova Scotia, Canada. July 20–30, 1989. International Geological Congress Field Trip T-351 79-80 [M. Carrano/M. Carrano]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 84111: authorized by Matthew Carrano, entered by Matthew Carrano on 17.09.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Reptilia
 Theropoda - Grallatoridae
Grallator sp., "Atreipus milfordensis" = Grallator tuberosus
Grallator sp. Hitchcock 1858 theropod
"Atreipus milfordensis" = Grallator tuberosus Hitchcock 1836 theropod
 Pseudosuchia - Gwyneddichniidae
Gwyneddichnium sp. Bock 1952 archosaur
 Pseudosuchia - Batrachopodidae
Batrachopus sp. Hitchcock 1845 aetosaur
 Pseudosuchia - Chirotheriidae
Brachychirotherium sp. Beurlen 1950 archosaur
 Squamata -
Rhynchosauroides sp. Maidwell 1911 squamates