C-30823 (Cretaceous of Canada)

Also known as GSC loc. C-20823 from Bank Island

Where: Northwest Territories, Canada (73.6° N, 118.3° W: paleocoordinates 72.6° N, 39.6° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Christopher (?) Formation, Aptian (125.0 - 113.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; lithology not reported

• Samples are from isolated outcrops to represent the initial phase of the transgression of the Christopher sea over the platform area. The low diversity but abundance of megaspores is suggestive of a nonmarine paleoenvironment for at least samples C-30573 and C-37219. Therefore, it may be equally plausible to interpret these samples as representing a late phase of the underlying, non-marine Isachsen Formation.

Size class: microfossils

Preservation: original sporopollenin

Reposited in the GSC

Collection methods: surface (in situ),

• C-30823 and C-37223 are treated as synonyms.

Primary reference: A. R. Sweet. 1979. Jurassic and Cretaceous Megaspores. AASP Contributions Series Number 5B: Contributions of Stratigrphic Palynology (with emphasis on North America): Mesozoic Palynology 2(5B):1-30 [R. Lupia/T. Naeher/T. Naeher]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 32565: authorized by Rick Lupia, entered by Tiffany Naeher on 09.07.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

• Figures represent the number of specimens recovered from 100 gms of sample.
Show authors, comments, and common names
unclassified
  -
Callistosporites graniferus
Lycopodiopsida
 Isoetales -
Minerisporites cf. alius, Minerisporites cf. marginatus, Minerisporites marginatus
Minerisporites cf. marginatus Potonie 1956 clubmoss
Minerisporites marginatus Potonie 1956 clubmoss
Dijkstraisporites
  -
Dijkstraisporites triangulatus