Lower Colville River, Locality 86/54
|Northern Alaska Map|
Kogosukruk Tongue of the Prince Creek Formation. This is a continuation of locality 86/52. At the base of the section is a brown mudstone overlain by 25 cm of brown mudstone reminiscent of a seat earth. This gives way to a 65 cm thick brown clay overlain by a 1.3 m thick gray silty clay with ironstone nodules at the base mostly barren of plant debris. This unit becomes an live color towards the top before giving way to a brown carbonaceous mudstone (25 cm thick) with abundant plant debris. This mudstone lenses with a beige clay. The plant debris partly consist of twigs. From out in the river it can be seen that this section is the base of a 2.6 m thick crossbedded succession possibly indicative of point bar deposition. This is the same unit with the ironstone at locality 86/53.
|Interactive map of the lower reaches of the Colville River showing plant fossil localities sampled by Smiley (1969) and by Parrish and Spicer in 1986.|
|Part of the exposure of the Prince Creek Formation (formerly the Kogosukruk Tongue of the Prince Creek Formation) on the western side of the Colville River between Uluksrak Bluff and Ocean Point.|