HS70a (Cretaceous to of Canada)

Also known as Drumheller Region - Horseshoe Canyon

Where: Alberta, Canada (51.4° N, 112.8° W: paleocoordinates 58.5° N, 87.1° W)

• coordinate stated in text

When: Battle Formation (Edmonton Group), Maastrichtian to Maastrichtian (72.1 - 56.0 Ma)

• Sample HS70a is in shale directly above sandstone bed about 120 ft below the top of section, base of Battle Formation.

Environment/lithology: shale

Size class: microfossils

Preservation: original sporopollenin

Collection methods: surface (in situ), chemical, sieve,

• The specimens figured in the paper have slide and collection number information. They also have more detailed locality information. Azollopsis tomentosa: AS-HS70a-S-2-1, GSC 30846a; AS-HS70a-S-2-1, GSC 30846b.

Primary reference: A.R. Sweet and L.V. Hills. 1974. A detailed study of the genus Azollopsis. Canadian Journal of Botany 52:1625-1642 [R. Lupia/B. Wilborn/B. Wilborn]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 34165: authorized by Rick Lupia, entered by Brooke Wilborn on 20.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Pteridopsida
 Salviniales - Azollaceae
Azollopsis tomentosa
massulae, microsporangia