Lower Colville River, Locality 86/60
|Northern Alaska Map||Fossil Images|
Approximately 1m of an olive green silty clay with yellow (sulphur?) mottling is exposed at the base of the section, becoming dark gray with yellow mottling towards the top of the unit. This is overlain by an indurated 45 cm thick gray brown siltstone with abundant carbonaceous debris. The unit, bearing some yellow ironstones and rooted, is the lateral equivalent of the Liscomb bone bed. The plant material present in these ironstones was collected as sample 86RAS300 images of which can be accessed by the link on the rifght in the bar above. At this site the next 2m of section is covered.
The section resumes with a 75 cm thick exposure of a rooted blue-mottled olive silt. This is overlain by a brown clayey silt 60 cm thick followed by a 30 cm blue-gray clay, 60 cm of an olive-yellow sandy siltstone, a 45 cm thick brown clay, and 30 cm of a yellow-brown silt. This is overlain by a 40 cm thick rooted brown clay followed by 30 cm of a dark brown rooted clay, more indurated towards the top, and some unidentified seeds. This unit is the lateral equivalent to a second bone bed. Above this is is a 90 cm thick rooted olive silty clay, followed by 25 cm of a rooted dark carbonaceous clay, a 30 cm of an olive clay and a 7.5cm thick white ash bed. This passes up to an olive silty clay, 55 cm thick, and a dark brown clay, 12.5 cm thick, with plant fragments. Above this is a rooted lighter brown clay 45 cm thick, a rooted dark olive silt 50 cm thick and a rooted chocolate brown clay that is 25 cm thick. This is overlain by a discontinuous yellow-white rooted ash appoximately 10 cm thick and then by a lighter brown rooted silt 25 cm thick.
All contacts are gradational.
Dinoaur bones found on the river bank below the Liscomb bone bed, Ocean Point.
|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.|