Sample Detail of
Sample: Sample No. 8-5-83A -- USGS No. 10748-SD
Locality: Field No. 8-5-83A
Description: Coral-brachiopod wackestone, fine-grained medium-dark-gray weathering shades of tan to orange to dark purple. From about 2 m above base of coral-brachiopod buildup (corals make up 90 percent of biomass). Elev. 1980 feet, lat. 67o 43.3 min., long. 160o 46.0 min., Baird Mountains C-4 quad. (description from Harris E&R report of 10/26/1983) [Oliver E&R report of 10/20/1983 provides following description: "At top of measured section at 1980 ft. elev. from widespread carbonate/clastic unit. SE 1/4 sec. 19, T. 27 N., R. 9 W. Baird Mtns. C-4 1:63,500."]
Location: Alaska Quadrangle: Baird Mts C-4
Township&Range: T27N R9W Section: SE1/4 sec. 19
Lat.: 67o43.3 ' Long.: 160o46.0 '
Reference
Title: Report on Referred Fossils ,  1983 (10/26)
The 20- to 200-mesh heavy- and light-mineral insoluble residues are being returned to Sue Karl.
Report by: Anita G. Harris
Referred by: Susan M. Karl , Inyo Ellersieck , Julie A. Dumoulin
Age: Emsian-Eifelian (probably latest Emsian - earliest Eifelian)
CAI:Min: 5
Comment:5 kg of rock was processed (92 g of +20 mesh insoluble residue)

The lobes of the basal cavity are corroded making it nearly impossible to distinguish which of two possible species of PANDORINELLINA this specimen belongs. The lower margin appear to be more reminiscent of P. EXPANSA.

AGE: SEROTINUS-COSTATUS COSTATUS Zones (latest Emsian to earliest Eifelian) or DENGLERI-Lower ASYMMETRICUS Zones (latest Givetian-earliest Frasnian). Probably SEROTINUS-COSTATUS COSTATUS Zones (see attached chart from Klapper & Johnson, 1980, showing conodont zones of the Lower and Middle Devonian).
CAI=5 indicating host rock reached 300 to 350o C.

Corals from this same sample indicate Silurian-Devonian age and brachiopods from 60 feet lower in section (USGS colln. 10818-SD) indicate a Middle-Late Devonian age.

REFERENCE
Klapper, Gilbert, and Johnson, J.G., 1980, Endemism and dispersal of Devonian conodonts: Jour. Paleontology, v. 54, p. 400-455.

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 1 very poorly preserved Panderodus? sp. element
2 Conodonts 1 Pa element of Pandorinellina insita (Stauffer) ....
3 Conodonts .... or Pandorinellina expansa (Uyeno & Mason)

Title: Report on Referred Fossils ,  1983 (10/20)
Report by: William A. Oliver , Jr.
Referred by: Anita G. Harris
Age: Silurian-Devonian
Comment:Silurian-Devonian. Preservation very poor.
Occurrence(s)
No. Group Name Qty Notes
1 Stromatoporoids Stromatoporoids--poorly preserved and indeterminate
2 Corals Corals?--none recognized as such