Also known as Kukpowruk River/Cape Lisburne floras
Where: western North Slope County, Alaska (69.3° N, 163.6° W: paleocoordinates 80.2° N, 93.4° 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 siltstone and coal
•extensive marine units on the south limb of Howard Syncline.
•Grey/brown siltstones approximately 1 m thick overlie thin
•carbonaceous grey/black shales which in turn overlie brown, finegrained
•sandstones (marine?). The grey/brown siltstones contain
•abundant Ginkgo leaves. Above these there is a layer of grey/brown
•siltstone with abundant Pityophyllum succeeded by a coal consisting
•almost entirely of Podozamites leaves capped by lumpy sheets of
•ironstone rich in Pityophyllum and Podozamites. Podozamites predominates.
•This is capped by a 10-cm-thick grey siltstone with
•abundant Podozamites. This passes into a 0.5-m-thick poor quality,
•iron-stained coal. The coal passes up into a 3-m-thick grey siltstone
•and then a light grey, weathering to yellow, fine-grained sandstone.
•Sample 96 RAS 113 is a portion of wood from the ironstone
•overlying the first coal, 96 RAS 114 is a sample from the top of the
•first Podozamites-rich coal, and 96 RAS 115 is a sample of the
•ironstone capping the first coal.
•Interpretation. Near-marine floodplain environment supporting
•wooded mires rich in Podozamites. Podozamites was apparently a
•major coal-forming plant.
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 34369: authorized by Dana Royer, entered by Dana Royer on 28.08.2003
Creative Commons license: CC BY (attribution)