Phoenixville Tunnel (Triassic of the United States)

Where: Chester County, Pennsylvania (40.1° N, 75.5° W: paleocoordinates 14.6° N, 20.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• From the Lower Lockatong Formation according to Olsen (1988). Two fossiliferous beds, about 500 ft apart.

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; shale

Size class: macrofossils

Reposited in the AMNH

Collection methods: salvage,

Primary reference: E. D. Cope. 1866. [A few observations on some of the extinct vertebrates of the Mesozoic Red Sandstone]. Proceedings of the Academy of Natural Sciences of Philadelphia 18:249-250 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 107421: authorized by Richard Butler, entered by Richard Butler on 07.04.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Osteichthyes
 Temnospondyli - Metoposauridae
Mastodonsaurus durus n. sp. Cope 1866 tetrapod
AMNH 3927, fragment of skull roof