Kukpowruk River 96-22 (Cretaceous of the United States)

Also known as Kukpowruk River/Cape Lisburne floras

Where: western North Slope County, Alaska (69.3° N, 162.6° W: paleocoordinates 80.0° N, 92.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Kukpowruk Formation, Albian (113.0 - 100.5 Ma)

• lower to middle Albian

• group of beds-level stratigraphic resolution

Environment/lithology: "floodplain"; brown, gray, silty mudstone and burrowed, fine-grained sandstone

• Description. Heavily rooted, grey/brown, silty mudstone with an

•incipient nodular texture containing abundant large Podozamites

•and long and short Pityphyllum leaves, Birisia fronds, and Equisetites.

•This passes up into coals with ironstone nodules. The ironstones

•contain abundant Podozamites. These pass up into sandstones

•with burrows. Long-leafed Pityophyllum occurred in fine-grained

•sandstones below the siltstone. Sample 96 RAS 116 represents

•Pityophyllum from the sandstones.

•Interpretation. Vegetated floodplain environment.

Size class: macrofossils

Collection methods: quarrying,

• Material stored at the Earth Sciences Department, The Open University, collection # 96 RAS.

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 34371: authorized by Dana Royer, entered by Dana Royer on 28.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Birisia alata
occurs in mudstones
Pityophyllum ex gr. nordenskioldii
occurs in mudstone (long and short leaves) and sandstone
 Peltaspermales - Peltaspermaceae
 Pinales - Podocarpaceae
Podozamites spp. Braun 1843
occurs abundantly in siltstone (large leaves); also occurs in ironstones within coals
 Equisetales - Equisetaceae
Equisetites ex gr. burejensis
occurs in mudstones