Union City Dam (Devonian of the United States)

Where: Erie County, Pennsylvania (41.9° N, 79.9° W: paleocoordinates 31.9° S, 28.0° W)

• coordinate estimated from map

When: Venango Formation, Late/Upper Devonian (382.7 - 358.9 Ma)

Environment/lithology: marine; gray, blue siltstone and shale

• According to A. Haussmann (personal ommunicatin to SC, 1987) the lower Venango was deposited in a shallow marine environment.
• soft shale and bluish-brownish-grey siltstone

Size classes: macrofossils, microfossils

Preservation: adpression, replaced with pyrite

Collection methods: bulk, chemical, mechanical, peel or thin section,

• A diverse assemblage of well preserved miospores was extracted from the rock close to the specimen. A variety of unidentified axes and pieces of trunks were also found.

Primary reference: S. Chitaley and D. C. McGregor. 1988. Bisporangiostrobus harrisii gen. et sp. nov., An eligulate lycopsid cone with duosporites megaspores and geminospora microspores from the Upper Devonian of Pennsylvania, U.S.A. Palaeontographica Abteilung B 210:127-149 [W. Stein/D. Horvath/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 23012: authorized by Bill Stein, entered by Dylan Horvath on 08.07.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

 Life -
Geminospora sp. Balme 1962
 Schizaeales -
  - Selaginellaceae
Neoraistrickia sp. PotoniƩ 1956