Kukpowruk River

The map on the right shows the localities along the Kukpowruk River sampled both by Smiley (reported in Smiley 1969a), Spicer and Herman (1996) and by Bob and Andrew Spicer in 1998. Click on the locality numbers to see further details of the sites and the fossil floras.

Locality 96-26.  69° 20' 40" N  162° 24' 24" W

Corwin Formation

Specimens: 96 RAS 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146

Description. Sequence of gray/brown silty mudstones with ironstone nodules, coals, and fine (rarely medium) gray/yellow sandstones. Phoenicopsis is abundant throughout and is the only common plant fossil in the sands. Very large-leaved Ginkgo ex gr. adiatoides, Desmiophyllum magnum, Birisia and Pagiophyllum tringulare occur in the mudstones.

Interpretation. Channel sands and near channel crevasse splay sands alternating with interfluve floodplain silts and muds with occasional mires.