779.70 m bed, GSC loc. C167141, Amoco Youngstown (Cretaceous of Canada)

Where: Alberta, Canada (51.6° N, 111.0° W: paleocoordinates 51.0° N, 64.9° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Westgate Formation (Colorado Group), Late/Upper Albian (105.3 - 99.6 Ma)

• Miliammina manitobensis Zone (Caldwell et al., 1978); meters indicate depth at which sample was taken

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, fine-grained siltstone and lithified mudstone

• extension of Mowry Sea, during late Albian (slight regression in late Late Albian), moderatly to well oxygenated bottom-waters; shallow wave influenced sea of inner nertic to possibly middle neritic depth
• well laminated, non bioturbated sediments

Size class: microfossils

Reposited in the GSC

Collection methods: core, chemical, smear slide,

• foraminiferal analysis utilizing the method of Then and Dougherty (1983) and washed over a 0.065 mm sieve; nannofossils were analyzed using the techniques from Edwards (1963), Stover (1966), Gartner (1968) and Smith (1981); standard acid processing techniques (Barss and Williams, 1973) were used followed by heavy liquid flotation and sieving to concentrate the dinoflagellates in the >0.045 and the 0.020-0.045 mm fractions

Primary reference: J. D. Bloch, C. J. Schröder-Adams, D.A. Leckie, J. Craig, and D.J. McIntyre. 1999. Sedimentology, micropaleontology, geochemistry and hydrocarbon potential of shale from the cretaceous Lower Colorado Group in Western Canada. Geological Survey of Canada, Bulletin 531:1-185 [W. Kiessling/T. Schossleitner]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 71368: authorized by Wolfgang Kiessling, entered by Thomas Schossleitner on 24.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• poorly preserved specimens of foraminifera, which are not unequivocally identifiable, are not included in the total counts
unclassified
  -
Foraminifera
 Trochamminacea - Trochamminidae
 Textulariina - Pseudobolivinidae
Pseudobolivina sp. Wiesner 1931
 Ammodiscoidea - Saccamminidae
 Astrorhizacea - Psammosphaeridae
 Astrorhizacea - Bathysiphonidae
 Lituolida - Haplophragmoididae
 Lituolida - Lituolidae
 Lituolida - Ammobaculinidae
 Lituolida - Rzehakinidae