USGS DR 2521, De Long Mountains [Siksikpuk Fm]: Serpukhovian, Alaska
collected by Dumoulin 2000

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Protozoa - Entactinaria - Entactiniidae
Belowea variabilis
synonym of Entactinosphaera
Protozoa - Latentifistularia - Ruzhencevispongidae
Scharfenbergia ruestae
replaced by Wonia
Scharfenbergia sp. Won 1983
replaced by Wonia
see common names

Geography
Country:United States State/province:Alaska
Coordinates: 68.1° North, 162.8° West (view map)
Paleocoordinates:32.9° North, 11.3° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Carboniferous Epoch:Late/Upper Mississippian
Stage:Serpukhovian 10 m.y. bin:Carboniferous 3
Key time interval:Serpukhovian
Age range of interval:330.90000 - 323.20000 m.y. ago
Stratigraphy
Geological group:Etivluk Formation:Siksikpuk
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Siksikpuk Formation of the Etivluk Gp. AGE: Probably late Late
Mississippian to early Middle Pennsylvanian (probably Chesterian-Morrowan); placed here in the Serpukhovian to avoid stratigraphic orhaning. STRATIGRAPHIC POSITION: Siksikpuk Formation (base of lower subunit) 0.5 m above Kuna Formation, on southeast side of “Orange Creek.” Contact marked by horizon of mammiform structures with 40 cm of vertical relief.
Lithology and environment
Primary lithology:gray,green,red or brown lithified chert
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Sample from 10 cm thick bed of moderate orange weathering, dark gray (locally slightly olive green) chert. Thin section shows scattered radiolarians, most filled with chalcedony, in cryptocrystalline chert matrix; test margins generally sharp and rim structure locally well preserved. LITHIFICATION: Lithified, on the basis of facies description and preparation techniques.
Environment:marine indet.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:field collection
Reason for describing collection:biostratigraphic analysis
Museum repositories:USNM
Collectors:Dumoulin Collection dates:2000
Collection method comments: COLLECTOR: J. A. Dumoulin. REPOSITORY: Presumably USNM.
Taxonomic list comments:COVERAGE: Exhaustive for radiolarians, possibly including conodonts and other macrofossils. NOMENCLATURE: Identified by C. D. Blome; not an authoritative publication, but with modern nomenclature and species-resolution identifications.
Metadata
Also known as:00AD20A; Loc. 72
Database number:91036
Authorizer:A. Hendy Enterer:A. Hendy
Research group:micropaleontology
Created:2009-09-01 08:26:29 Last modified:2013-11-25 13:37:23
Access level:the public Released:2009-09-01 08:26:29
Creative Commons license:CC BY
Reference information

Primary reference:

30624. J. A. Dumoulin, A. G. Harris, C. D. Blome and L. E. Young. 2006. Conodont and radiolarian data from the De Long Mountains Quadrangle and adjacent areas, northern Alaska. United States Geological Survey Open-File Report 2006(106):1-174 [A. Hendy/A. Hendy]