Sample Detail of
Sample: Sample No. 82ABs180A -- USGS No. 32467-PC
Locality: Field No. 82ABs180A
Description: Howard Pass C-5. Lat. 68o 37'50" N., Long. 158o 52'40" W. Dark-brownish-gray to brownish-black, light-gray- to slightly brownish-weathering, mostly micritic dolostone (some skeletal supportstone with clasts of brown mudstone) and dark-gray to black chert containing locally preserved, rare to abundant crinoid fragments; chert and dolostone interlayered (50:50) in 2- to 7-cm-thick beds. Sample from rubble at very top of approx. 100-m-thick section of unusually carbonate-rich facies of unit lPMap. Rocks are similar to basal part of section at Lisburne Ridge; also resembles unit Mlri but is dolomitized and does not contain sills. Samples 92ADo274B (loc. 7) and 92ADo275 (table 2, loc. 8) are also from this facies. Chert overlying(?) this facies at this locality (92ABs180B; table 2) produced Late? Triassic radiolarians (description from Dover et al., 2008, p. 31 (Table 1))
Location: Alaska Quadrangle: Howard Pass C-5
Lat.: 68o37'50 " Long.: 158o52'40 "
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: Kinderhookian-Meramecian
Formation: Akmalik Chert
CAI:Min: 2
Comment:Age: Mississippian; Kinderhookian-Meramecian (the age of sample 92ADo274B is middle Osagean).

Biofacies: Indeterminate (too few conodonts)

Shown as locality 10 on Sheet 2, map unit: lPMap

CAI=(approx.) 2

Processed 11.5 kg of rock

Occurrence(s)
No. Group Name Qty Notes
1 Conodonts 3 Pa element fragments of Bispathodus stabilis (Branson and Mehl) ..... All conodonts identified by A.G. Harris. All conodonts are small fragments and heavily coated and invaded by organic matter making CAI difficult to determine.
2 Conodonts ..... or Bispathodus utahensis Sandberg and Gutschick
3 Conodonts 51 indet. bar, blade, and platform fragments