DeLong Mnt., Kogruk Fm, section 62C-15, 690 ft (Carboniferous of the United States)

Where: Alaska (68.3° N, 163.4° W: paleocoordinates 32.8° N, 11.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Kogruk Formation (Lisburne Group), Serpukhovian (330.9 - 323.2 Ma)

Environment/lithology: deep subtidal shelf; gray limestone and cherty/siliceous grainstone

• Composed of carbonate rock deposited in normal-marine to shoaling-water environments. In outcrop the Kogruk Formation is medium- to massive-bedded light-olive-gray to medium-gray limestone and in places is cliff forming. It contains nodular to lenticular lightgray to dark-gray chert. The amount of chert, varies markedly at different horizons

Size classes: macrofossils, mesofossils

Primary reference: A. K. Armstrong. 1970. Carbonate Facies and the Lithostrotionid Corals of the Mississippian Kogruk Formation, DeLong Mountains, Northwestern Alaska. Geological Survey Professional Paper 664 [W. Kiessling/M. Krause]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 158048: authorized by Wolfgang Kiessling, entered by Mihaela Krause on 14.07.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

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Anthozoa
 Stauriida - Lithostrotionidae
Lithostrotion (Siphonodendron) sinuosum