Also known as USGS M6527; 75APr43D (Marincovich field #)
Where: Lituya County, Alaska (58.4° N, 137.1° W)
• Paleocoordinates: 63.1° N, 132.1° W (Wright 2013)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Topsy Formation, Burdigalian to Burdigalian (20.4 - 11.6 Ma)
• Topsy Formation consists of about 365 metres of hard calcareous siltstone and sandstone that intertongue with and in part, conformably overlie the Cenotaph Volcanics. Topsy Formation underlies Yakataga Formation (early Miocene-Holocene). Age originally assigned to post-early Oligocene to pre-middle Miocene based on volcanics (Plafker, 1967). Biostratigraphy in this reference constrains age to early or middle Miocene
• bed-level stratigraphic resolution
Environment/lithology: coastal; lithified siltstone and lithified sandstone
Size class: macrofossils
Reposited in the USNM
Collection methods: quarrying,
• Fossil collections are housed in the USGS, Menlo Park, and type specimens in the NMNH, Washington
Primary reference: L. Marincovich. 1979. Miocene molluscks of the Topsy Formation, Lituya district, Gulf of Alaska Tertiary Province, Alaska. United States Geological Survey Professional Paper 1125(C):C1-C14 [A. Miller/A. Hendy/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 37384: authorized by Austin Hendy, entered by Austin Hendy on 14.03.2004
Creative Commons license: CC0 (CC0)
Taxonomic list
Bivalvia | |
Lucinoma acutilineata Conrad 1849 clam |