Sample Detail of
Sample: Sample No. 92AD214-18.5 -- USGS No. 32464-PC
Locality: Field No. 92AD214-18.5
Description: Howard Pass B-5. Lat. 68o 23'10" N., Long. 158o 54'00" W. Lithology similar to 92AD214-1.5, but collected from a fetid, 40-cm-thick graded bed, a few meters below mafic dike and 18.5 m above base of approx. 85-m-thick measured section. Thin section is normally graded, parallel-laminated, quartz-carbonate sandstone cemented with calcite. Quartz grains (20-30 percent of slide) are angular, chiefly 60-90 microns in diameter. Carbonate clasts include crinoid ossicles and sponge spicules (some spicules partly pyritized). (description from Dover et al., 2004, p. 46 (Table 1)); [Howard Pass- B-5. 68°23'13", 158°54'00". Has similar lithology to 92AD214-1.5, but collected from a fetid, 40-cm-thick bed, a few meters below mafic dike.
From same locality as above ("referring to 92AD214-1.5"). (description from Harris E&R report dated March 17, 1995; shipment no. A-95-3)]
Location: Alaska Quadrangle: Howard Pass B-5
Township&Range: 12 S. 30 W. Section: 22
Lat.: 68o23'10 " Long.: 158o54'00 "
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 (late Early Mississippian (middle Osagean))
Formation: Lisburne Group (Rim Butte unit of Lisburne Group of Dumoulin and others (1993) (Mississippian))
CAI:Min: 2.5
Comment:Age: late Early Mississippian; Sc. anchoralis-Do. latus Zone (middle Osagean).

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

Shown as locality 89 on Sheet 2; map unit: Mlri

CAI=2.5

Processed 6.0 kg of rock.

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 1 juvenile Pa element Bactrognathus? sp. All conodonts identified by A.G. Harris
2 Conodonts 2 Pa elements Doliognathus latus Branson and Mehl
3 Conodonts 8 bar fragments "Hindeodella" segaformis Bischoff s.f.
4 Conodonts 5 Pa elements Polygnathus communis communis Branson and Mehl
5 Conodonts 3 Pa element fragments Scaliognathus? sp. indet.
6 Conodonts Unassigned elements: 7 M and 2 Sa
7 Conodonts 40 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 (middle Osagean)
Formation: Lisburne Group
CAI:Min: 2.5
Comment:Age: Sc. anchoralis-Do. latus Zone (middle Osagean)
Biofacies: Indeterminate (too few conodonts); outer shelf or deeper water depositional environment.
CAI = 2.5

6.0 kg of rock processed (2520 g of +20 mesh and 236 g 20-140 mesh insoluble residue).
Heavy-mineral concentrate: chiefly chalcopyrite, bornite, and clusters of cryptocrystalline dolomite(?).

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 1 juvenile Pa element Bactrognathus? sp.
2 Conodonts 2 Pa elements Doliognathus latus Branson and Mehl
3 Conodonts 8 bar fragments "Hindeodella" segaformis Bischoff s.f.
4 Conodonts 5 Pa elements Polygnathus communis communis Branson and Mehl
5 Conodonts 3 Pb element fragments Scaliognathus? sp. indet.
6 Conodonts UNASSIGNED ELEMENTS: 7 M and 2 Sa
7 Conodonts 40 indet. bar, blade, and platform fragments