Also known as USGS M6499, UCMP IP 22709
Where: Kodiak County, Alaska (56.5° N, 154.3° W: paleocoordinates 57.8° N, 150.6° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Narrow Cape Formation, Early/Lower Miocene to Early/Lower Miocene (23.0 - 11.6 Ma)
• Narrow Cape Formation. Late Oligocene or early Miocene age. Overlies Early Oligocene Sitkinak Formation. Total thickness of formation about 210 m.
• bed-level stratigraphic resolution
Environment/lithology: offshore; poorly lithified, pebbly siltstone
Size class: macrofossils
Preservation: concretion
Reposited in the USNM
Collection methods: quarrying,
• Collections housed in USGS, Menlo Park; University of Alaska, and USNM
Primary reference: R. C. Allison and L. Marincovich. 1981. A late Oligocene or earliest Miocene molluscan fauna from Sitkinak Island, Alaska. United States Geological Survey Professional Paper 1233:1-11 [A. Miller/A. Hendy/M. Krause]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 37652: authorized by Austin Hendy, entered by Austin Hendy on 19.03.2004
Creative Commons license: CC BY (attribution)
Taxonomic list
Gastropoda | |
Neptuneidae indet. Stimpson 1865 snail | |
Calyptraea cf. diegoana Conrad 1855 slipper shell | |
"Turritella (Hataiella) cf. chichibuensis" = Hataiella
"Turritella (Hataiella) cf. chichibuensis" = Hataiella turret shell | |
Buccinum ? kurodai true whelk
Ancistrolepis eucosmius true whelk
? Ancistrolepis beringianus true whelk | |
Bruclarkia cf. andersoni snail
Bruclarkia sp. Trask 1926 snail | |
Priscofusus clarki snail | |
Parasyrinx sp. Finlay 1924 turrid | |
Polinices (Polinices) cf. lincolnensis, Neverita (Neverita) washingtonensis, "Natica (Cryptonatica) clausa" = Cryptonatica affinis
Polinices (Polinices) cf. lincolnensis Weaver 1916 moon snail
Neverita (Neverita) washingtonensis Weaver 1916 moon snail
"Natica (Cryptonatica) clausa" = Cryptonatica affinis Gmelin 1791 moon snail | |
Bivalvia | |
Clinocardium cf. makiyamae Kamada 1962 cockle | |
Macoma (Macoma) golikovi, "Macoma twinensis" = Macoma (Macoma) twinensis
Macoma (Macoma) golikovi Scarlato and Kafanov 1988 tellin clam
"Macoma twinensis" = Macoma (Macoma) twinensis Clark 1925 tellin clam | |
Hiatella arctica Linnaeus 1767 clam | |
Cyclocardia sp. Conrad 1867 clam
Cyclocardia cf. tokunagai Yokoyama 1924 clam |