Bed 12, Section 1 - Lower shale-siltstone division, Aklavik Range (Jurassic of Canada)

Also known as Field No. 22, Bed 12

Where: Northwest Territories, Canada (68.0° N, 135.5° W: paleocoordinates 67.4° N, 65.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Lower Member (Lower Shale-Siltstone Formation), Tithonian (152.1 - 145.0 Ma)

• 27-27.5 ft thick shale, 258.5-271 ft above the base of the section; assigned to the Aucella fischeri-Aucella trigonalis biozone; classified as "Lower Mbr" of the "lower shale-siltstone division" in Jeletzky (1958); Jeletzky (1958) assigns this unit an upper Tithonian age.

• bed-level stratigraphic resolution

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

• No environmental data reported.
• Shale, blackish grey, rusty weathering, fissile, concretionary.

Size class: macrofossils

Preservation: concretion

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 55877: authorized by Austin Hendy, entered by Austin Hendy on 07.11.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Collection appears not to be exhaustive.
Show authors, comments, and common names
Bivalvia
 Pectinida - Buchiidae
"Aucella mniovnikensis" = Buchia, Aucella fischeri, "Aucella piochii" = Buchia piochii, "Aucella volgensis" = Buchia volgensis
"Aucella mniovnikensis" = Buchia scallop
Aucella fischeri Pavlow 1907 scallop
"Aucella piochii" = Buchia piochii Gabb 1864 scallop
"Aucella volgensis" = Buchia volgensis Lahusen 1888 scallop