Colville River-Awuna River (2) (Cretaceous of the United States)

Where: Alaska (69.1° N, 155.3° W: paleocoordinates 77.4° N, 93.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Niakogon Tongue Member (Nanushuk Formation), Early/Lower Cenomanian (99.6 - 93.5 Ma)

• orig. part of Chandler Fm.

• bed-level stratigraphic resolution

Environment/lithology: mire or swamp; ironstone

• "bog deposits...wetter and had less standing vegetation than a swamp but was so choked with plant debris that typical pond sediments did not accumulate"
• "ironstone beds"; "characterized by dark red-orange clay ironstone nodules"

Size class: macrofossils

Preservation: mold/impression

Collected in 1986

Collection methods: quarrying,

Primary reference: J. M. Parrish, J. T. Parrish, J. H. Hutchison and R. A. Spicer. 1987. Late Cretaceous vertebrate fossils from the North Slope of Alaska and implications for dinosaur ecology. Palaios 2:377-389 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 62635: authorized by Matthew Carrano, entered by Matthew Carrano on 24.07.2006, edited by Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia indet. Linnaeus 1758 clam
numerous specimens of "freshwater clams"; one tooth-marked specimen
 Testudinata -
Testudinata indet. Oppel 1811 turtle