Bed 3, Section 1 - Lower shale-siltstone division, Aklavik Range (Jurassic of Canada)

Also known as Field No. 22, Bed 3

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)

• 1-9 ft thick shale, 27-36.5 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; lithified, fine-grained, gray sandstone

• No environmental data reported.
• Sandstone, grey, speckled, fine-grained, hard; interbeds of darker coloured, softer, silty sandstone.

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 55879: 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.
Gastropoda
 Cerithioidea - Turritellidae
Turritella sp. turret shell
Bivalvia
 Pectinida - Pectinoidae
"Pecten cf. cinctus" = Camptonectes (Boreionectes) cinctus
"Pecten cf. cinctus" = Camptonectes (Boreionectes) cinctus Sowerby 1822 scallop
 Pectinida - Buchiidae
"Aucella piochii" = Buchia piochii, "Aucella russiensis" = Buchia piochii, "Aucella mniovnikensis" = Buchia, "Aucella cf. subpallasi" = Buchia, Aucella fischeri, "Aucella trigonoides" = Buchia trigonoides
"Aucella piochii" = Buchia piochii Gabb 1864 scallop
"Aucella russiensis" = Buchia piochii Gabb 1864 scallop
"Aucella mniovnikensis" = Buchia scallop
"Aucella cf. subpallasi" = Buchia scallop
Aucella fischeri Pavlow 1907 scallop
"Aucella trigonoides" = Buchia trigonoides Lahusen Smith 1894 scallop
 Pectinida - Limidae
Lima sp. Bruguière 1797 file clam
 Mytilida - Mytilidae
Modiolus sp. Lamarck 1801 mussel
 Pholadida - Pleuromyidae
Pleuromya sp. Meek 1873 clam