Where: Alaska (62.0° N, 146.8° W: paleocoordinates 69.9° N, 103.1° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Pachydiscus kamishakensis ammonoid zone, Matanuska Formation, Late/Upper Campanian (83.5 - 70.6 Ma)

• Matanuska formation, Late Campanian or Maestrichtian. Pachydiscus kamishakensis zone

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified siliciclastic sediments

Size class: macrofossils

Collected by J.R. Williams in 1952; reposited in the 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 158241: authorized by Matthew Clapham, entered by Matthew Clapham on 17.07.2014

Creative Commons license: CC BY (attribution)