USGS 11847-SD Shublik Mountains section 87NA-2: Late/Upper Emsian, Alaska

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Conodonta - Prioniodontida - Icriodontidae
Sannemannia aff. glenisteri
Conodonta - Ozarkodinida - Polygnathidae
Polygnathus inversus
Pandorinellina steinhornensis
var. miae
see common names

Geography
Country:United States State/province:Alaska
Coordinates: 69.5° North, 145.6° West (view map)
Paleocoordinates:1.0° South, 30.4° West
Basis of coordinate:estimated from map
Time
Period:Devonian Epoch:Early/Lower Devonian
Stage:Emsian 10 m.y. bin:Devonian 2
Key time interval:Late/Upper Emsian
Age range of interval:398.30000 - 393.30000 m.y. ago
Stratigraphy
Formation:Nanook Member:8
Stratigraphic resolution:bed
Stratigraphy comments: 115.2 m above base of section.
JA: originally entered as Emsian; shown as from the "inversus-serotinus zone" and therefore late Emsian
Lithology and environment
Primary lithology:gray lithified calcareous mudstone
Secondary lithology: lithified wackestone
Environment:shallow subtidal indet.
Geology comments: Warm, possibly very shallow water depositional environment.
Taphonomy
Modes of preservation:body
Size of fossils:microfossils
Collection methods and comments
Collection excludes:some microfossils
Reason for describing collection:general faunal/floral analysis
Taxonomic list comments:Identified by A.G. Harris.
Metadata
Database number:114841
Authorizer:A. Miller Enterer:S. Kolbe
Modifier:J. Alroy Research group:marine invertebrate
Created:2011-08-25 04:43:05 Last modified:2012-08-20 00:52:14
Access level:the public Released:2011-08-25 04:43:05
Creative Commons license:CC BY
Reference information

Primary reference:
36729. 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]