Sample Detail of
Sample: Sample No. 92AD59AA -- USGS No. 32453-PC
Locality: Field No. 92AD59AA
Description: Howard Pass C-5. Lat. 68o 35'45" N., Lat. 158o 27'20" W. Lithologically similar to 92AD59A, but a thicker bed (15-35 cm) that has obvious parallel and cross laminae on weathered surface. Thin section is calcite-replaced-radiolarian-packstone that contains lesser sponge spicules; matrix is noncalcareous mud. Collected approx. 15 m below 92AD59A. (description from Dover et al., 2004, p. 31 (Table 1)); [Howard Pass C-5. 68°35'48", 158°27'25". Similar in lithology to 92AD59A, but in a thicker bed (15-35 cm), with obvious parallel and cross laminae on weathered surface. Collected ~ 15 m below 92AD59A.
From same locality as above ("referring to 92AD59A"). (description from Harris E&R report dated March 17, 1995; shipment no. A-95-3)]
Location: Alaska Quadrangle: Howard Pass C-5
Township&Range: 10 S. 28 W. Section: 9
Lat.: 68o35'45 " Long.: 158o27'20 "
Reference
Title: Geologic and fossil locality maps of the west-central part of the Howard Pass Quadangle and part of the adjacent Misheguk Mountains Quadrangle, western Brooks Range, Alaska ,  2004
Report by: Jim Dover , Irv L. Tailleur , Julie A. Dumoulin
Age: Osagean-Meramecian (late Osagean - Meramecian (late Early-early Late Mississippian))
Formation: Kuna Formation
CAI:Min: 1.5 - Max: 2
Comment:Age: late Early-early Late Mississippian; Po. mehli-lower G. texanus Zone through Lower Cavusgnathus Zone (late Osagean through Meramecian); probably late Osagean.

Biofacies: Indeterminate (too few conodonts); mid-shelf or deeper water depositional environment.

Shown as locality 21 on Sheet 2; map unit: lPMk

CAI=1.5-2

Processed 9.3 kg

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 3 Pa elements Gnathodus texanus Roundy All conodonts identified by A.G. Harris. All conodonts partly coated and invaded by organic matter.
2 Conodonts 23 indet. bar, blade, and platform fragments

Title: Report on Referred Fossils ,  1995 (03/17)
Analysis of all samples is given in the accompanying 16-page table. The range of biostratigraphically important samples is shown on the accompanying diagram. The heavy-mineral concentrates were analyzed by Nancy Stamm; the residues have been returned to Julie Dumoulin. Please note a few (~4 samples have heavy-mineral concentrates that include chalcopyrite and bornite).
Report by: Anita G. Harris
Referred by: Julie A. Dumoulin , J. H. Dover
Age: Osagean-Meramecian (late Osagean - Meramecian, probably late Osagean)
Formation: Lisburne Group (Mississippian "deeper water facies" of the Lisburne Group)
CAI:Min: 1.5 - Max: 2
Comment:Age: Lower G. texanus Zone through Lower Cavusgnathus Zone =late Osagean through Meramecian); probably late Osagean. Biofacies: Indeterminate (too few conodonts); mid-shelf or deeper water depositional environment.
CAI =1.5-2

9.3 kg of rock processed (3800 g of +20 mesh and 218 g 20-140 mesh insoluble residue).
Heavy-mineral concentrate: chiefly phosphatized composite grains, barite(?), iron oxides, and minor fluorite.

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts All conodonts partly coated and invaded by organic grunge
2 Conodonts 3 Pa elements Gnathodus texanus Roundy
3 Conodonts 23 indet. bar, blade, and platform fragments