GSC loc. C-90843 - 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)

• Freboldi Zone

• 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 53119: authorized by Martin Aberhan, entered by Sabine Nürnberg on 06.09.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Parallelodontidae
Grammatodon (Grammatodon) sp. Meek and Hayden 1860 clam
sp. A
Cephalopoda
 Ammonitida - Polymorphitidae
Dayiceras sp. ammonite
? Uptonia sp. Buckman 1898 ammonite
 Ammonitida - Eoderoceratidae
Dubariceras freboldi Dommergues et al. 1984 ammonite
Dubariceras silviesi Hertlein 1925 ammonite
Metaderoceras cf. mouterdei Frebold 1970 ammonite
Metaderoceras talkeetnaense Thomson and Smith 1992 ammonite
Metaderoceras aff. talkeetnaense Thomson and Smith 1992 ammonite