Sample Detail of
Sample: Sample No. 90AD61Z -- USGS No. 30939-PC
Locality: Field No. 90AD61Z
Description: Howard Pass C-3. Lat. 68o 33'58" N., Long. 157o 35'10" W. a few specimens have a surficial gray patina suggesting rapid heating; sample taken 5 m above a mafic sill. (description from Dover et al., 2004, p. 67 (Table 4))
Location: Alaska Quadrangle: Howard Pass C-3
Lat.: 68o33'58 " Long.: 157o35'10 "
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 (Nolder than late Early Mississippian (no older than early Osagean))
Formation: Unnamed (Rim Butte unit of Lisburne Group of Dumoulin and others (1993) (Mississippian))
CAI:Min: 3 - Max: 3.5
Comment:Age: No older than late Early Mississippian (no older than early Osagean); contains redeposited conodonts of early Early Mississippian (Kinderhookian) age.

CAI=3-3.5

Shown as locality 47 on Sheet 2; map unit: Mlri

REFERENCE: Dumoulin, J.A., Harris, A.G., and Schmidt, J.M., 1993, Deep-water lithofacies and conodont faunas of the Lisburne Group, western Brooks Range, Alaska, in Dusel-Bacon, C., and Till, A.B., eds., Geologic Studies in Alaska by the U.S. Geological Survey during 1992: U.S. Geological Survey Bulletin 2068, p. 12-30.

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts Conodonts see also Dumoulin and others, 1993, table 1, loc. 20