Sample Detail of
Sample: Sample No. 91Tr47D -- USGS No. 31851-PC
Locality: Field No. 91Tr47D
Description: Howard Pass C-3. North-south traverse through section of unit Mlb: 68o 30.6' N., 157o 32.45' W. (base, 47A) to 68o 30.5' N., 157o 32.45' W. (top, 47F). Interlayered black chert and carbonate containing some fossil fragments. Thin section is dolostone (crystals 0.1-1.0 mm) with little relict texture. (description from Dover et al., 2004, p. 40 (Table 1)); [Howard Pass C-3 quad. 68°30.60', 157°32.45'. Lisburne Group (Brooks Range allochthon); interlayers black chert carbonate containing some fossil fragments. Thin section is dolostone containing crystals 0.1-1.0 mm and little relict texture. (description from Harris E&R report dated Sept. 17, 1993; Shipment no. A-93-11)]
Location: Alaska Quadrangle: Howard Pass C-3
Lat.: 68o30.6 ' Long.: 157o32.45 '
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: Kinderhookian-Osagean (Early Mississippian (late Kinderhookian - Osagean))
Formation: Lisburne Group (Bupto facies of Lisburne Group (Upper and Lower Mississippian))
CAI:Min: 1.5 - Max: 2
Comment:Age: Early Mississippian (late Kinderhookian-Osagean).

Biofacies: Indeterminate.

Shown as locality 69 on Sheet 2; map unit: Mlb

CAI=1.5-2

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts Bispathodus aff. B. utahensis Sandberg and Gutschick, 5 Pa and 1 Pb elements All conodonts identified by A.G. Harris
2 Conodonts 2 Pa elements Hindeodus aff. H. crassidentatus (Branson and Mehl)
3 Conodonts Idioprioniodus sp. indet., 2 Sa and 9 Sc elements
4 Conodonts Unassigned elements: 2 Pb (2 morphotypes) and 8 M (3 morphotypes)
5 Conodonts 78 indet. bar, blade, and platform fragments

Title: Report on Referred Fossils ,  1993 (09/17)
This report is long (1.5 years) overdue, but I have been exceedingly busy writing papers, responding to reviewers and editors comments and preparing talks. I am finally returning to a partial E&R mode and your collections were at the top of the list.
Report by: Anita G. Harris
Referred by: Irv L. Tailleur , John S. Kelley
Age: Kinderhookian-Osagean (late Kinderhookian - Osagean)
Formation: Lisburne Group
CAI:Min: 1.5 - Max: 2
Comment:Age: late Kinderhookian-Osagean
Biofacies: Indeterminate
Thin section description by Julie A. Dumoulin.
CAI = 1.5-2
Heavy-mineral concentrate: iron oxides, phosphatized bioclasts, and dolomite.
Occurrence(s)
No. Group Name Qty Notes
1 Conodonts Bispathodus aff. B. utahensis Sandberg and Gutschick 5 Pa and 1 Pb elements
2 Conodonts 2 Pa elements Hindeodus aff. H. crassidentatus (Branson and Mehl)
3 Conodonts Idioprioniodus sp. indet. 2 Sa and 9 Sc elements
4 Conodonts UNASSIGNED ELEMENTS: 2 Pb (2 morphotypes) & 8 M (3 morphotypes)
5 Conodonts 94 indet. bar, blade, and platform fragments