GSC C-118569, Cascade Peninsula (Cretaceous of Canada)

Also known as MVA(F)85-148

Where: British Columbia, Canada (49.4° N, 121.8° W: paleocoordinates 46.9° N, 68.8° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Buchia crassicollis other zone, Brokenback Hill Formation, Late/Upper Valanginian (140.2 - 136.4 Ma)

• Abundant fossils found in sandstone and tuff of Brokenback Hill Formation. The Brokenback Hill Fm ranges from upper Valanginian to middle Albian in age. All colllections have relatively fine temporal resolution however due to ammonite biostratigraphy. SPECIFIC AGE DATA: Same as for GSC C-117401. Some part of Buchia crassicollis zone and upper Valanginian in terms of international standard stages (see Jeletzky, 1965).

• bed-level stratigraphic resolution

Environment/lithology: offshore; tuffaceous sandstone and tuff

• Relatively deep water conditions, quiet water, soft substrate, some wave action, occasional ripple marks, fairly proximal volcanic source.
• SPECIFIC DATA: green sandstone; GENERAL INFORMATION: The Brokenback Fm is mainly green crystal tuff, volcanic conglomerate, and tuffaceous sandstone.

Size class: macrofossils

Reposited in the GSC

Collection methods: quarrying,

• Collections made in 1985by A.J. Arthur and P.L. Smith; collections reposited in the GSC.

Primary reference: A. J. Arthur, P. L. Smith, J. W. H. Monger and H. W. Tipper. 1993. Mesozoic stratigraphy and Jurassic paleontology west of Harrison Lake, southwestern British Columbia. Geological Survey of Canada Bulletin 441:1-62 [A. Miller/A. Hendy/M. Clapham]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 57077: authorized by Austin Hendy, entered by Austin Hendy on 01.12.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Authoritative nomeclature.
Bivalvia
 Pectinida - Buchiidae
Buchia crassicollis Keyserling 1846 scallop
Buchia crassicollis var. solida