Sample Detail of
Sample: Sample No. 92AD20-14.5 -- USGS No. 32426-PC
Locality: Field No. 92AD20-14.5
Description: Howard Pass C-3. Lat. 68o 38'10" N., Lat. 157o 31'40" W. Crinoidal lime pack/grainstone (probable gravity flow deposit) about 14.5 m below top of 42-m-thick section. Thin section is crinoidal pack/grainstone with lesser bryozoans, siliceous sponge spicules, ostracodes, gastropods, brachiopod fragments, echinoderm spines, and phosphatic bioclasts; minor noncalcareous mud clasts, glauconite, and dolomite. Sample collected from carbonate turbidites (and thus may contain reworked faunas). (description from Dover et al., 2004, p. 33 (Table 1)); [Howard Pass C-3. 68°38'10" W, 157°31'40". Crinoidal lime grainstone/packstone. Probable gravity flow deposit. Sample collected from carbonate turbidites(may contain reworked faunas?).
92AD20-4.5 through 92AD22A from 66.5+m thick measured section in sequence of "Ipnavik facies" of Lisburne Group overlain (unconformably?) by Cretaceous sandstone. The section may be cut by faults, but if is not repeated, 92AD20-4.5 should be the youngest, and 92AD22A should be the oldest. ....92AD20-4.5 and -14.5 collected above change in attitude (fault?)
92AD20-4.5,-14.5 and 92AD220-23 collected from -700-660 m elevation on west side of NW-trending ridge, ~2 miles due east of Cutaway Creek and ~2.5 miles due south of headwaters of Lost Temper Creek, western Brooks Range; SW1/4NE1/4 sec. 28, T. 9 S., R. 24 W. (description from Harris E&R report dated March 17, 1995)]
Location: Alaska Quadrangle: Howard Pass C-3
Township&Range: 9 S. 24 W. Section: 28
Lat.: 68o38'10 " Long.: 157o31'40 "
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 (middle Osagean or younger)
Formation: Lisburne Group (Rim Butte unit of Lisburne Group of Dumoulin and others (1993) (Mississippian))
CAI:Min: 1.5
Comment:Age: No older than late Early Mississippian; Sc. anchoralis-Do. latus Zone (middle Osagean or younger) along with redeposited Famennian (late Late Devonian ) and middle-late Kinderhookian conodonts. This assemblage is typical of the Rim Butte unit of the Lisburne Group.

Biofacies: Lag concentrate or turbidite. Postmortem transport from or within the biospathodid biofacies.

Shown as locality 27 on Sheet 2; map unit: Mlri

CAI=1.5

Processed 7.0 kg of rock.

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 121 Pa elements Bispathodus utahensis Sandberg and Gutschick (all large and partly incomplete) All conodonts identified by A.G. Harris
2 Conodonts 1 Pa element Doliognathus latus Branson and Mehl
3 Conodonts 5 Idioprioniodus sp. indet. element fragments
4 Conodonts 17 incomplete Pa elements of Pseudopolygnathus spp.
5 Conodonts Unassigned elements: 7 robust Pb (Osagean morphotype) and 1 M
6 Conodonts Unassigned elements: 11 indet. bar, blad, and platform fragments
7 Conodonts 1 Pa element Polygnathus inornatus E.R. Branson Redeposited middle-late Kinderhookian conodonts
8 Conodonts 2 Pa element fragments Siphonodella sp. indet. Redeposited middle-late Kinderhookian conodonts
9 Conodonts 1 Pa element Palmatolepis sp. Redeposited Famennian conodonts

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 (no older than S. anchoralis-D. latus Zone (middle Osagean or younger))
Formation: Lisburne Group (Rim Butte unit (Ipnavik facies) of the Lisburne Group)
CAI:Min: 1.5
Comment:Age: No older than S. anchoralis-D. latus Zone (middle Osagean or younger) with redeposited Famennian (late Late Devonian) and middle-late Kinderhookian conodonts. This is typical of Rim Butte unit (Ipnavik facies) of the Lisburne Group.
Biofacies: Lag concentrate or turbidite. Postmortem transport from or within the bispathodid biofacies.
CAI 1.5

7.0 kg rock processed (280 g +20 mesh and 109 g 20-200 mesh insoluble residue).
Heavy-mineral concentrate: abundant unpicked conodont fragments, lesser phosphatized bioclasts and composite grains and iron oxides. (description from Harris E&R dated March 17, 1995)]

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 121 Pa elements Bispathodus utahensis Sandberg and Gutschick (all large and fairly complete)
2 Conodonts 1 Pa element Doliognathus latus Branson and Mehl
3 Conodonts 5 Idioprioniodus sp. indet. element fragments
4 Conodonts 17 incomplete Pa elements of Pseudopolygnathus spp.
5 Conodonts 7 unassigned robust Pb element of Osagean morphotype
6 Conodonts 1 unassigned M element
7 Conodonts 11 indet. bar, blade, and platform fragments
8 Conodonts REDEPOSITED MIDDLE-LATE KINDERHOOKIAN CONODONTS:
9 Conodonts 1 Pa element Polygnathus inornatus E.R. Branson
10 Conodonts 2 Pa element fragments Siphonodella sp. indet.
11 Conodonts REDEPOSITED FAMENNIAN CONODONTS
12 Conodonts 1 Pa element Palmatolepis sp.