Basal shale, Section 5 - Lower Shale-Siltstone Division, Aklavik Range (Cretaceous of Canada)

Also known as Field No. 16, Basal shale

Where: Northwest Territories, Canada (67.9° N, 135.4° W: paleocoordinates 68.4° N, 66.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Lower Member (Lower Shale-Siltstone Formation), Berriasian (145.0 - 139.8 Ma)

• 15 ft thick shale below bed 1 at base of section; from Aucella okensis biozone; classified as "lower member" of "lower shale-siltstone division" in Jeletzky (1958); Jeletzky (1958) assigns this biozone a Berriasian age.

• bed-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, black, gray shale

• No environmental data available.
• Blackish grey shales.

Size class: macrofossils

Reposited in the GSC

Collection methods: quarrying,

• Collected by Jeletzky; presumably reposited in GSC collections .

Primary reference: J. A. Jeletzky. 1958. Uppermost Jurassic and Cretaceous rocks of Aklavik Range, Northeastern Richardson Mountains, Northwest Territories. Geological Survey of Canada, Paper 58(2):1-84 [A. Miller/A. Hendy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 55848: authorized by Austin Hendy, entered by Austin Hendy on 06.11.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Collection appears not to be exhaustive.
Cephalopoda
 Ammonitida - Polyptychitidae
Polyptychites (? Tollia) sp. Pavlow 1892 ammonite
Bivalvia
 Pectinida - Buchiidae
"Aucella ex gr. okensis" = Buchia okensis, "Aucella volgensis" = Buchia volgensis
"Aucella ex gr. okensis" = Buchia okensis Pavlow 1907 scallop
"Aucella volgensis" = Buchia volgensis Lahusen 1888 scallop