GSC loc. C-080592, Graham Island (Jurassic of Canada)

Where: British Columbia, Canada (53.4° N, 132.3° W: paleocoordinates 6.1° N, 126.2° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Graham Island Formation (Yakoun Group), Early/Lower Bajocian (171.6 - 168.4 Ma)

• Informal Radiolarian Zone 7 (begins with Ovalis and end within Laeviuscula Ammonite Zone); meters indicate distance from base of Graham Island Fm

• bed-level stratigraphic resolution

Environment/lithology: offshore; lithified, gray, calcareous shale

• deep water that was commonly euxinic
• lithology of sample: brownish gray limestone (fine grained calcarenite) buff weathering, containig some volcanic glass

•lithology of sample/(sequence): dark gray shale and siltstone with rare sandy layers and thin beds of buff weathering concretionary limestone

Size class: microfossils

Reposited in the GSC

• collected by B.E.B. Cameron, 1980; focus on radiolarians

Primary reference: E.S. Carter, B.E.B. Cameron, and P.L. Smith. 1988. Lower and Middle Jurassic radiolarian biostratigraphy and systematic paleontology, Queen Charlotte Islands, British Columbia. Geological Survey of Canada, Bulletin 386:1-109 [W. Kiessling/T. Schossleitner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 71122: authorized by Wolfgang Kiessling, entered by Thomas Schossleitner on 19.04.2007, edited by Adam Kocsis

Creative Commons license: CC BY (attribution)

Taxonomic list

• rare: 1-2 specimens; common: 3-6 specimens; abundant: >6 specimens
Show authors, comments, and common names
unclassified
  -
Lophodictyotidium cf. sarjeanti
Protozoa
 Nassellaria - Eucyrtidiidae
Stichocapsa cf. convexa, Stichocapsa aff. japonica, ? Eucyrtidium "sp. A"
Stichocapsa cf. convexa Yao 1979 radiolarian
Stichocapsa aff. japonica Yao 1979 radiolarian
? Eucyrtidium "sp. A" Ehrenberg 1847 radiolarian
 Nassellaria - Parvicingulidae
Parvicingula "sp. B", Parvicingula "sp. C", Parvicingula "sp. F", Parvicingula matura
Parvicingula "sp. B" Pessagno 1977 radiolarian
Parvicingula "sp. C" Pessagno 1977 radiolarian
Parvicingula "sp. F" Pessagno 1977 radiolarian
Parvicingula matura Pessagno and Whalen 1982 radiolarian
 Nassellaria - Williriedellidae
Tricolocapsa cf. rusti
 Spumellaria - Pantanelliidae
Trillus seidersi, Trillus elkhornensis, Zartus thayeri, Zartus jurassicus
Trillus seidersi radiolarian
Trillus elkhornensis Pessagno and Blome 1980 radiolarian
Zartus thayeri Pessagno and Blome 1980 radiolarian
Zartus jurassicus Pessagno and Blome 1980 radiolarian