Where: Alaska (69.5° N, 145.6° W: paleocoordinates 14.4° N, 45.9° W)
• coordinate estimated from map
When: Aphelognathus divergens conodont zone, 7 Member (Nanook Formation), Ashgill (449.5 - 443.7 Ma)
• 11.0 to 11.3 m above base of section. Probably Richmondian given divergens. Originally entered as Member 8, but that is the Devonian ; Member 7 is inferred.
• bed-level stratigraphic resolution
Environment/lithology: lagoonal or restricted shallow subtidal; lithified limestone
Size classes: macrofossils, microfossils
Primary reference: R. B. Blodgett, D. M. Rohr, A. G. Harris and R. Jia-yu. 1987. A major unconformity between Upper Ordovician and Lower Devonian strata in the Nanook Limestone, Shublik Mountains, northeastern Brooks Range. United States Geological Survey Circular 1016:18-23 [A. Miller/S. Kolbe]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 113018: authorized by Arnold Miller, entered by Sarah Kolbe on 19.07.2011
Creative Commons license: CC BY (attribution)
Taxonomic list
Conodonta | |
Aphelognathus sp. conodont | |
Panderodus sp. Ethington 1959 conodont
Pseudobelodina cf. adentata conodont
Pseudobelodina aff. vulgaris Sweet 1979 conodont | |
Drepanoistodus suberectus Branson and Mehl 1933 conodont | |
Bivalvia | |
Bivalvia indet. Linnaeus 1758 clam | |
Gastropoda | |
"Maclurites cf. manitobensis" = Maclurina manitobensis
"Maclurites cf. manitobensis" = Maclurina manitobensis Whiteaves 1890 snail | |
Siskiyouspira sp. Rohr 1980 snail | |
? Murchisonia sp. d'Archiac and de Verneuil 1841 snail | |
Ectomaria cf. prisca Billings 1859 snail | |
Cephalopoda | |
Cephalopoda indet. Cuvier 1797 | |
Rhynchonellata | |
"Tscherskidium sp." = Tcherskidium
"Tscherskidium sp." = Tcherskidium | |
Deuteropoda | |
Ostracoda indet. Latreille 1802 ostracod | |
Ostracoda | |
Sibiritia sp. Abushik 1958 ostracod |