Vittrekwa River - North Branch Formation (lower) (Jurassic of Canada)

Where: Yukon, Canada (67.1° N, 135.7° W: paleocoordinates 66.6° N, 66.5° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: North Branch Formation, Tithonian (152.1 - 145.0 Ma)

• Collection from the "North Branch Formation" unit of the Vittrekwa River section. This lower part of the succession is assigned a Tithonian age (=Portlandian?) based on macrofossil biostratigraphy (Buchia mosquensis biozone of Jeletzky, 1958). Underlies conformably lower Berriasian age North Branch Formation of the Buchia okensis biozone.

• bed-level stratigraphic resolution

Environment/lithology: foreshore; pebbly, conglomeratic sandstone

• Mainly beach to piedmont paleoenvironments.
• Mainly interbedding of sandstone, grit, and pebble conglomerate.

Size class: macrofossils

Reposited in the GSC

Collection methods: quarrying,

• Collection is a composite derived from Fig. 2 of Jeletzky (1978), and amalgamated from occurrences of individual taxa on composite columns for individual lithostratigraphic units. Collections presumably are reposited in the Geological Survey of Canada collections.

Primary reference: J. A. Jeletzky. 1975. Jurassic and Lower Cretaceous paleogeographgy and depositional tectonics of Porcupine Plateau. adjacent areas of Northern Yukon and those of MacKensie District. Geological Survey of Canada, Paper 74(16):1-52 [A. Miller/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 55977: authorized by Austin Hendy, entered by Austin Hendy on 09.11.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Definately not an exhaustive taxonomic list; taxonomic nomenclature appears reliable.
Bivalvia
 Pectinida - Buchiidae
Buchia mosquensis White 1885 scallop