Kukpowruk River 96-14 (Cretaceous to of the United States)

Also known as Kukpowruk River/Cape Lisburne floras

Where: western North Slope County, Alaska (69.1° N, 162.8° W: paleocoordinates 79.0° N, 96.9° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Corwin Formation, Albian to Albian (113.0 - 93.9 Ma)

• middle Albian to Cenomanian

• group of beds-level stratigraphic resolution

Environment/lithology: delta plain; gray, carbonaceous siltstone

• Description. The outcrop exposes dark grey carbonaceous siltstones/

•shales underlying fine sandstones. Siltstones contain Podozamites,

•Ginkgo, Equisetites rhizomes, rare Birisia and Pityophyllum. Podozamites

•and Equisetites predominate. Plant roots are abundant

•and Equisetites rhizomes with nodules occur even in the sandier

•facies. In the overlying sandstones there are ripples with wavelengths

•of 2.5 cm, plant fragments, worm traces and possible

•bivalve impressions.

•Interpretation. Probably a near-marine, lower delta plain interfluve


Size class: macrofossils

Collection methods: quarrying,

Primary reference: R. A. Spicer and A. B. Herman. 2001. The Albian-Cenomanian flora of the Kukpowruk River, western North Slope, Alaska: stratigraphy, palaeofloristics, and plant communities. Cretaceous Research 22:1-40 [D. Royer/D. Royer/D. Royer]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 34297: authorized by Dana Royer, entered by Dana Royer on 26.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Birisia alata
occurs rarely in siltstones
Pityophyllum sp. Seward 1919
occurs in siltstones
 Pinales - Podocarpaceae
Podozamites spp. Braun 1843
dominant in siltstones
 Equisetales - Equisetaceae
Equisetites ex gr. burejensis
rhizomes, with nodules; dominates in siltstones and sandstones