Where: Matanuska-Susitna County, Alaska (62.0° N, 147.8° W)

• Paleocoordinates: 75.3° N, 97.3° W (Wright 2013)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pachydiscus kamishakensis ammonoid zone, Matanuska Formation, Late/Upper Campanian to Late/Upper Campanian (83.5 - 66.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Matanuska Fm, which unconformably overlie Early Cretaceous strata, including the Nelchina Limestone. AGE: Late Campanian or Maastrichtian, on the basis of ammonite biostratigraphy; Pachydiscus kamishakensis zone. STRATIGRAPHIC POSITION: From upper part of member 3, Matanuska Fm.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified siltstone and lithified shale

Size class: macrofossils

Preservation: mold/impression

Collected by Grant & Fay in 1953; reposited in the USNM

Collection methods: surface (in situ),

• COLLECTOR: A. Grant & L. Fay, 1953. REPOSITORY: USNM.

Primary reference: D. L. Jones. 1963. Upper Cretaceous (Campanian and Maestrichtian) ammonites from southern Alaska. United States Geological Survey Professional Paper 432:1-53 [L. Ivany/L. Ivany/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 88823: authorized by Austin Hendy, entered by Austin Hendy on 21.04.2009

Creative Commons license: CC0 (CC0)