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

Show authors, comments, and common names
unclassified
  -
Bisporangiostrobus harrisii, Ancyrospora sp., Aneurospora greggsii, Archaeotriletes senticosus, Auroraspora hyalina, Auroraspora macra, Auroraspora solisorta, Auroraspora torquata, Corbulispora cancellata, Cyrtospora cf. cristifera, Diaphanospora sp., Hystricosporites multifurcatus, Hystricosporites porcatus, Leiozonotriletes sp., Lophozonotriletes excisus, Lophozonotriletes tuberosus, Rugospora flexuosa, Secarisporites sp., Spelaeotriletes crustalus, Spelaeotriletes resolutus, Vallatisporites pusilites
Bisporangiostrobus harrisii
primary specimen- forked axis and two cones
Ancyrospora sp.
multifurcate processes
Hymenozonotriletes
  -
Hymenozonotriletes explanatus, Hymenozonotriletes granulatus
Lycopodiopsida
 Selaginellales - Selaginellaceae
Neoraistrickia sp.
Neoraistrickia sp. Potonié 1956 spikemoss
Dictyotriletes
  -
Dictyotriletes nefandus
Emphanisporites
  -
Emphanisporites cf. annulatus, Emphanisporites cf. pantagiatus, Emphanisporites sp., Emphanisporites rotatus
Emphanisporites sp. McGregor 1961
Emphanisporites rotatus Macgregor 1973
Polypodiopsida
 Schizaeales - Polypodiidae
Convolutispora cf. opressa
  -
Verrucosisporites nitidus, Verrucosisporites scurrus
Lycopsida
  -
Kraeuselisporites sp.
Retusotriletes
  -
Retusotriletes phillipsii
Knoxisporites
  -
Knoxisporites dedaleus
 Life -
Geminospora sp.
Geminospora sp. Balme 1962
Grandispora
  -
Grandispora cornuta, Grandispora upensis, Grandispora sp.
Grandispora sp. Hoffmeister 1955