Also known as Locality #1
Where: Dillingham County, Alaska (60.9° N, 157.4° W: paleocoordinates 7.8° N, 80.4° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Holitna Group, Norian (228.0 - 208.5 Ma)
• No formal stratigraphic name has been applied to the Triassic rocks of the Taylor Mountain D-2 and D-3 quadrangles. The term "Holitna Group" has been suggested to be too broadly defined (includes all Paleozoic carvonates in the Holitna River section). LePain and others (2000) designated these strata as Tzrlc (silty limestone and chert) on their geological map. Total thickness of Triassic rocks in section is unknown, although a minimum thickness of 300 m is estimated.
• bed-level stratigraphic resolution
Environment/lithology: marine; yellow, silty, calcareous mudstone
Size class: macrofossils
Preservation: recrystallized, replaced with silica
Collection methods: quarrying,
• Collected by R.B. Blodgett (1984, 1999). Field #84RB32, 99RB35. Fossil fauna composed of numerous mollusks (bivalves, gastropods) and lesser brachiopods. Collections deposited in U of Alaska Museum in Fairbanks
Primary reference: C. A. McRoberts and R. B. Blodgett. 2000. Late Triassic (Norian) mollusks from the Taylor Mountains quadrangle, southwestern Alaska. United States Geological Survey Professional Paper 1662:55-67 [A. Miller/A. Hendy/S. Kolbe]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 39896: authorized by Austin Hendy, entered by Austin Hendy on 11.06.2004, edited by Uta Merkel
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
Gryphaea arcuataeformis Kiparisova 1936 oyster | |
Cassianella cordillerana n. sp.
Cassianella cordillerana n. sp. McRoberts and Blodgett 2000 oyster | |
Astarte sp. Sowerby 1816 clam | |
Tutcheria densestriata Koerner 1937 clam | |
Septocardia cf. peruviana Cox 1949 cockle | |
Minetrigonia sp. Kobayashi and Katayama 1938 clam
Minetrigonia cf. suttonensis Clapp and Shimer 1911 clam | |
Gastropoda | |
Andangularia wilsoni n. sp.
Andangularia wilsoni n. sp. McRoberts and Blodgett 2000 snail | |
Neritaria nuetzeli n. sp.
Neritaria nuetzeli n. sp. McRoberts and Blodgett 2000 snail | |
Chulitnacula alaskana Smith 1927 snail |