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 96-16.   69° 07' 31" N  162° 41' 45" W

Corwin Formation

Specimens: 96 RAS 77, 78, 79

Description. Yellow/orange fine sandstones passing laterally upstream to lumpy brown siltstones. Siltstones overly gray/orange siltstone with small bivalves. Mirella aff. borealis and Equisetites rhizomes (very long - up to 0.5 m) occur abundantly in the siltstones.

Interpretation: Near shore interbedded marine (?) and non-marine sediments possibly representing a distal delta distributary and overbank environments.

Between localities 14 to 16 there are exposures along the river with deltaic or near shore marine sandstones and, at two sites, swamp facies represented by gray/brown silts rich in organic material and plant fossils. Podozamites predominates with Equisetites, Pityophyllum and wood fragments.