GSC loc. C-90524 - Spatsizi River (Jurassic of Canada)

Where: British Columbia, Canada (57.5° N, 128.9° W: paleocoordinates 33.0° N, 71.0° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Freboldi ammonoid zone, Joan Member (Spatsizi Formation), Ibex (189.6 - 183.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified siltstone

• The Joan Fm. contains a diverse bivalve fauna that indicates a relatively shallow to moderately deep water environment of deposition, corresponding to composite assemblage depth zones B and C of Taylor (1982).

Size class: macrofossils

Preservation: mold/impression

Reposited in the GSC

Collection methods: mechanical,

Primary reference: R. C. Thomson and P. L. Smith. 1992. Pliensbachian (Lower Jurassic) biostratigraphy and ammonite fauna of the Spatsizi area, north-central British Columbia. Geological Survey of Canada Bulletin 437:1-87 [M. Aberhan/S. Nurnberg/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 53180: authorized by Martin Aberhan, entered by Sabine Nürnberg on 07.09.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Ostreida - Bakevelliidae
Gervillaria pallas2 Leanza 1942 oyster
 Carditida - Astartidae
Astartidae indet.1 d'Orbigny 1844 clam
 Trigoniida - Trigoniidae
Trigoniidae indet.1 Lamarck 1819 clam
Cephalopoda
 Ammonitida - Eoderoceratidae
Dubariceras freboldi Dommergues et al. 1984 ammonite
Dubariceras silviesi Hertlein 1925 ammonite