Where: Matanuska-Susitna County, Alaska (61.9° N, 147.6° W: paleocoordinates 70.1° N, 102.8° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Inoceramus schmidti inoceramid zone, Matanuska Formation, Late/Upper Campanian (83.5 - 70.6 Ma)
• STRATIGRAPHIC RELATIONS: From the Matanuska Fm, which unconformably overlie Early Cretaceous strata, including the Nelchina Limestone. AGE: Campanian, on the basis of ammonite biostratigraphy; Inoceramus schmidti zone. STRATIGRAPHIC POSITION: From middle 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 Martin in 1913; reposited in the USNM
Collection methods: surface (in situ),
• COLLECTOR: G.C. Martin, 1913. 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 88815: authorized by Austin Hendy, entered by Austin Hendy on 21.04.2009
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Inoceramus cf. subundatus Meek 1861 clam | |
Cephalopoda | |
Anapachydiscus nelchinensis Jones 1963 ammonite |