Where: Alaska (64.1° N, 141.8° W: paleocoordinates 64.2° N, 141.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Gelasian (2.6 - 1.8 Ma)

• Sample from silt and peat between units D and E. Lost Chicken tephra dated at 2.6 +/- 0.45 Ma based on zircon fission-track. Unit C sediments just below LCT at Section 91-2 have a normal remanent magnetic polarity (Fig. 3), which suggests that LCT was deposited during the youngest normal subchron of the Gauss chron, that is, between 2.581 and 3.040 myr (Cande and Kent, 1995). The reversed magnetic polarity of Unit A likely means that it was deposited during the Kaena subchron (3.040–3.110 myr; Cande and Kent, 1995), whereas the reversed magnetic polarity of Units D and E, which occur above LCT, suggests that these silty sediments accumulated during the early part of the Matuyama chron.

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; unlithified siltstone

Size class: macrofossils

Reposited in the GSC

Primary reference: J. V. Matthews, J. A. Westgate, L. Ovenden, L. D. Carter, and T. Fouch. 2003. Stratigraphy, fossils, and age of sediments at the upper pit of the Lost Chicken gold mine: new information on the late Pliocene environment of east central Alaska. Quaternary Research 60:9-18 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 162794: authorized by Matthew Clapham, entered by Matthew Clapham on 05.10.2014

Creative Commons license: CC BY (attribution)