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Upper Colville River, Alaska

No material from this locality was photographed         Upper Colville Fossil Images Unassigned

 

This interactive map of part of the Colville River, Northern Alaska, shows the locations of plant fossil collections made by J.T. Parrish and R.A. Spicer in 1985 and 1989. Click on a number for more details on that site. The red outlined area links to another map showing positions of florules (plant fossil assemblages) collected by C.J. Smiley along both the Colville and Chandler Rivers.

Interactive map of the Upper Colville River Hotspot linking to 85RAS09 Hotspot linking to Smiley's Colville and Chandler River localities. Hotspot linking to 85RAS02 Hotspot linking to 85RAS01 Hotspot linking to 85RAS03 Hotspot linking to 85RAS04 Hotspot linking to 85RAS05 Hotspot linking to 85RAS06 Hotspot linking to 85RAS07 Hotspot linking to 85RAS08 Hotspot linking to 85RAS10 Hotspot linking to 85RAS11 Hotspot linking to 85RAS12 Hotspot linking to 85RAS13 Hotspot linking to 85RAS14 Hotspot linking to 85RAS13 Hotspot linking to 85RAS16 Hotspot linking to 85RAS17 Hotspot linking to 85RAS18 Hotspot linking to 85RAS19 Hotspot linking to 89RAS1_3 Hotspot linking to 89RAS04 Hotspot linking to 89RAS05 Hotspot linking to 89RAS06 Hotspot linking to 89RAS07 Hotspot linking to 89RAS09 Hotspot linking to 89RAS10 Hotspot linking to 89RAS11 Hotspot linking to 89RAS12 Hotspot linking to 89RAS164_320

Locality 85JTP06

This locality is mapped as belonging to KcKt (lower part of the Killik Tongue of the Chandler Formation and Tuktu Formation undifferentiated, Chapman et al., 1964). Mull et al. (2003) reassigned this unit to the middle part of the Nanushuk Formation. However the junction between KcKt and KcK1 (the predominantly non-marine Lower Killik Tongue of the Chandler Formation) is close to this locality.

Although no material from this locality was collected in 1985 fossils were collected in 1989. See locality 89JTP05. The locality is at the downstream end of the predominantly marine 'amphitheatre' section at the marine/non-marine transition. Coal beds in these lower Killik Tongue sediments begin to occur approximately 15 m stratigraphically below demonstrably marine units. Equisetites occurs as float. Generally the abundance of plant material in float increases downstream of the centre of the amphitheatre. The coal seams are generally less than 1 m in thickness and some contain in situ tree bases. The coals are separated by brown to gray siltstones, clays and sandstones. In the upper part of this section mudstones contain numerous Podozamites remains.

The following is a summary of the lithologies in the section as recorded by J.T. Parrish in July 1985.

Top of section    
  17 m Sandstone, planar bedded at the base but with large scale load structures in the middle. This represents several rapid depositional events. Intervening fine grained sediment is rare.
  71 m Interbedded sandstones and mudstones or siltstones
  21 m Sandstone, siltstones, claystone. Wood fragments present
  0.76 m Coal
  21.3 m Claystone with abundant ironstone concretions
  3.8 m Shaley coal
  4.6 m Cover
  1.5 m Fine sandstone
  4 m Siltstone and coal
  1.8 m Claystone
  2.4 m Coal
  9.1 Fine sandstone with in situ tree bases
  0.6 m Coal
  12.2 m Siltstones with abundant ironstones
  3.9 m Shales containing a 0.3 m thick coal
  13.7 m Cover
  1.5 m Siltstone
  5.8 m Sandstone
  1.5 m Cover

 

Hotspot linking to Smiley's Colville and Chandler River localities. Hotspot linking to localities along the Kukpowruk River Hotspot linking to the Kuk River Localities

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