Sample Detail of
Sample: Sample No. 91Tr24A.1 -- USGS No. 31842-PC
Locality: Field No. 91Tr24A.1
Description: Howard Pass C-3. Lat. 68o 35.7' N., Long. 157o 30' W. Talus blocks <1 m in size of very fine grained, medium-yellowish-gray to grayish-yellow, massive carbonate rock. Stratigraphic position within unit uncertain. Thin section is brecciated dolostone containing skeletal fragments. Origianl texture probably a sparsely skeletal mudstone-wackestone. Bioclasts (5-25 percent of the sample) are crinoid ossicles and possible brachiopod and bryozoan fragments; minor detrital quartz. Heavy-mineral concentrate includes rare phosphatic brachiopod fragments. (description from Dover et al., 2004, p. 34 (Table 1)); [Howard Pass C-3 quad. 69°35.98', 157°30.15'. Submitted as Baird Group, talus blocks < than 1 m in size. Very fine-grained, medium-yellowish-gray to grayish-yellow, massive limestone. Stratigraphic position in stack not known. Thin section indicates brecciated dolostone containing skeletal fragments. Original texture appears to have been a skeletal mudstone/-wackestone. Skeletal elements make up 5-25 percent of the sample and are crinoid ossicles and possible brachiopod and bryozoan fragments: minor detrital quartz.
Stack on bed in Cutaway Creek near lake in northeast basin east of base of stack. (description from Harris E&R report dated Sept. 17, 1993; Shipment no. A-93-11)]
Location: Alaska Quadrangle: Howard Pass C-3
Lat.: 68o35.7 ' Long.: 157o30' "
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-Chesterian (Osagean - Chesterian (Mississippian))
Formation: Lisburne Group (Bupto facies of Lisburne Group (Upper and Lower Mississippian))
CAI:Min: 1.5
Comment:Age: Mississippian; Osagean-Chesterian

Biofacies: Indeterminate; too few conodonts

Shown as locality 41 on Sheet 2; map unit: Mlb

CAI=1.5

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 1 mid Pa fragment of a cavusgnathoid All conodonts identified by A.G. Harris
2 Conodonts 2 Sa element fragments of Kladognathus sp. indet.
3 Conodonts Unassigned elements: 1 M and 2 Sb
4 Conodonts 25 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: Osagean-Chesterian (Mississippian, Osagean - Chesterian)
Formation: Lisburne Group (Lisburne Group (submitted as Baird Group))
CAI:Min: 1.5
Comment:Age: Mississippian, Osagean to Chesterian; talus blocks are not part of the Baird Group (see write up for 91TR24A.2 for more detail).
Biofacies: Indeterminate (too few conodonts)
Thin section description by Julie A. Dumoulin.
CAI = 1.5

Heavy-mineral concentrate: chiefly fresh and weathered, euhedra and euhedral clusters of pyrite and rare phosphatic brachiopod fragments.

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 1 mid Pa fragment of a cavusgnathoid
2 Conodonts 2 Sa element fragments of Kladognathus sp. indet.
3 Conodonts UNASSIGNED ELEMENTS: 1 M and 2 Sb
4 Conodonts 25 indet. bar, blade, and platform fragments