Also known as M1183
Where: Aleutians East County, Alaska (55.7° N, 160.2° W: paleocoordinates 58.8° N, 154.0° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Stepovak Formation, Oligocene (33.9 - 23.0 Ma)
• Also within the type area of the Stepovak Formation ("series"). The Stepovak Formation reaches around 6500 ft in thickness and comprises sandstones and siltstones. Collection probably middle Oligocene. Collection from near middle of formation at top of unit 3.
• bed-level stratigraphic resolution
Environment/lithology: marine; brown, gray sandstone and black siltstone
Size class: macrofossils
Collection methods: Collections examined by F.S. MacNeil and D. Taylor (USGS), 1962. Collections are reposited at USGS Menlo Park, or presumably USNM (not reported)
Primary reference: C.A. Burk. 1965. Geology of the Alaska Peninsula-island arc and continental margin (Part 1). Geological Society of America Memoir 99(1) [A. Miller/A. Hendy/A. Hendy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 44109: authorized by Austin Hendy, entered by Austin Hendy on 01.09.2004, edited by Mihaela Krause
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
? Perse sp. Clark 1918 snail | |
Bivalvia | |
Vertipecten sp. n. sp. Grant and Gale 1931 scallop
Chlamys aff. ashiyaensis Nagao 1928 scallop | |
Modiolus cf. harrimani mussel | |
? Spisula sp. n. sp.
| |