Sample Detail of
Sample: Sample No. 91Tr47B -- USGS No. 31848-PC
Locality: Field No. 91Tr47B
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). Sample from <5 m-thick interval of thick-bedded, dark-gray to brownish-gray, fine-grained, encrinitic limestone. Thin section is skeletal grainstone; bioclasts mostly bryozoans and lesser crinoid ossicle and brachiopods. Some bioclasts partly silicified; others have micritized rims. Local areas of dolomitic mud rich in calcareous spicules; some muddy zones may be burrows. Heavy-mineral concentrate includes phosphatic brachiopod fragments. (description from Dover et al., 2004, p. 39 (Table 1)); [Howard Pass C-3 quad. 68°30.60', 157°32.45'. Lisburne Group (Brooks Range allochthon); <5 m interval of thick-bedded, dark-gray to brownish-gray, fine-grained, encrinitic limestone. Thin section is skeletal grainstone. Skeletals mostly bryozoans, lesser crinoid ossicles and brachiopods. Some skeletals partly silicified; others have micritized rims. Local areas of dolomitic mud rich in calcareous spicules; some muddy zones may be burrows. (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 - early 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-early 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 1 mid-Pa element fragment of bispathodid?. All conodonts identified by A.G. Harris
2 Conodonts 1 Pa fragment Hindeodus aff. H. crassidentatus (Branson and Mehl)
3 Conodonts 1 Pa fragment mestognathid?
4 Conodonts 1 juvenile Pa element Mestognathus aff. M. harmalai von Bitter, Sandberg, and Orchard
5 Conodonts Unassigned elements: 2 Pb and 2 Sc
6 Conodonts 7 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 - early Osagean)
Formation: Lisburne Group
Comment:Age: late Kinderhookian-early Osagean
Biofacies: Indeterminate
Thin section description by Julie A. Dumoulin.
CAI = 1.5-2

Heavy-mineral concentrate: chiefly iron-oxide or weathered pyrite steinkerns and iron oxides and minor amounts of dolomite and phosphatic brachiopod fragments.

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 1 mid-Pa element fragment of a bispathodid?
2 Conodonts 1 Pa fragment Hindeodus aff. H. crassidentatus (Branson and Mehl)
3 Conodonts 1 Pa fragment mestognathid?
4 Conodonts 1 juvenile Pa element Mestognathus aff. M. harmalai von Bitter, Sandberg, and Orchard
5 Conodonts UNASSIGNED ELEMENTS: 2 Pb and 2 Sc
6 Conodonts 7 indet. bar, blade, and platform fragments