Sample Detail of
Sample: Sample No. 92ARm31C -- USGS No. 32470-PC
Locality: Field No. 92ARm31C
Description: Howard Pass B-5. Lat. 68o 23' N., Long. 158o 49'40" W. Platy limestone. Heavy-mineral concentrate includes phosphatized and (or) pyritized bioclasts and grains, and rare phosphatized gastropods. (description from Dover et al., 2004, p. 48 (Table 1)); [Howard Pass B-5. 68°22'58", 158°49'32". Platy limestone. Submitted as Ipnavik facies of the Lisburne(?) Group.
Collected at -460 m of elevation, -1/3 mile west of Primus Creek and - 1 1/2 miles north of junction of Primus and Buccaneer creeks; SE1/4 SW1/4 sec. 24, T. 12 S., R. 30 W. (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: 24
Lat.: 68o23' " Long.: 158o49'40 "
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: 3
Comment:Age: late Early Mississippian; Sc. anchoralis-Do. latus Zone (middle Osagean)

Biofacies: Mixed biofacies typical of unit Mlri turbidites. Slope or deeper water depositional environment.

Shown as locality 92 on Sheet 2; map unit: Mlri

CAI=3

Processed 4.3 kg of rock.

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 2 Pa elements Bispathodus utahensis Sandberg and Gutschick All conodonts identified by A.G. Harris
2 Conodonts 3 Pa element fragments Doliognathus latus Branson and Mehl
3 Conodonts 17 small bar fragments "Hindeodella" segaformis Bischoff s.f.
4 Conodonts 6 Pa elements Polygnathus communis communis Branson and Mehl
5 Conodonts 3 Pa element fragments Geniculatus claviger Hass
6 Conodonts Unassigned: 3 Pb (2 Osagean morphotypes), 9 M, and 2 Sc
7 Conodonts 151 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 (Ipnavik facies of the Lisburne(?) Group)
CAI:Min: 3
Comment:Age: Sc. anchoralis-Do. latus Zone (middle Osagean)
Biofacies: Mixed biofacies typical of Ipnavik turbidites. Slope or deeper water depositional environment.
CAI = 3

4.3 kg of rock processed (1520 g of +20 mesh and 555 g 20-140 mesh insoluble residue).
Heavy-mineral concentrate: chiefly ferruginous and nonferruginous clusters of quartz(?) or dolomite(?) and phosphatized and/or pyritized bioclasts and grains, and rare phosphatized gastropods and dolomite rhombs.

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 2 Pa elements Bispathodus utahensis Sandberg and Gutschick
2 Conodonts 3 Pa element fragments Doliognathus latus Branson and Mehl
3 Conodonts 17 small bar fragments "Hindeodella" segaformis Bischoff s.f.
4 Conodonts 6 Pa elements Polygnathus communis communis Branson and Mehl
5 Conodonts 3 Pa element fragments Geniculatus claviger Hass
6 Conodonts UNASSIGNED ELEMENTS: 3 Pa (2 Osagean morphotypes), 9 M, and 2 Sc
7 Conodonts 151 indet. bar, blade, and platform fragments