Sample Detail of
Sample: Sample No. 92ABs125 -- USGS No. DR 1503
Locality: Field No. 92ABs125
Description: Howard Pass B-3. Lat. 68o 25'48" N., Long. 157o 17'05" W. Light-greenish-gray-weathering, dark-gray, vitreous chert with conchoidal fracture, orange-brown iron stain, and locally abundant radiolarians, beds 1-10 cm thick (average approx. 6 cm). (description from Dover et al., 2004, p. 63 (Table 2)); [Formation: Chert interbedded in undated volcaniclastic unit. USGS Howard Pass 1:250,000 B3 quadrangle, T. 12 S., R. 24 W., sec. 2; approx. 0.75 mi south of upper part of main SW tributary of Bupto Creek, north end of ridge and approx. 1.25 mi west of hill 852 and 0.75 mi SW of locality 92ABs122. Lat 68°25'42", long 157°17'11". (description from Blome and Reed E&R report dated June 23, 1993; Shipment no. A-92-9D)]
Location: Alaska Quadrangle: Howard Pass B-3
Township&Range: 12 S. 24 W. Section: 2
Lat.: 68o25'48 " Long.: 157o17'05 "
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: Carnian-Norian (Late Triassic (late Carnian - middle Norian))
Formation: Imnaitchiak Chert
Comment:Age: Late Triassic (late Carnian to middle Norian; Capnodoce Zone of Blome, 1984, and Blome and others, 1988).

Shown as locality 136 on Sheet 2; map unit: JlPip REFERENCES
Blome, C.D., 1984, Upper Triassic radiolarians and radiolarian zonation for western North America: Bulletins of American Paleontology, v. 85, no. 318, 88 p.
Blome, C.D., Reed, K.M., and Tailleur, I.L., 1988, Radiolarian biostratigraphy of the Otuk Formation in and near the National Petroleum Reserve in Alaska, in Gryc, G., ed., Geology and Exploration of the National Petroleum Reserve in Alaska, 1974-1982: U.S. Geological Survey Professional Paper 1399, p. 725-776.

Occurrence(s)
No. Group Name Qty Notes
1 Radiolarian Poorly preserved forms incluidng ?Canoptum sp. (casts) radiolarians identified by C.D. Blome and K.M. Reed
2 Radiolarian Capnuchosphaera sp. (isolated tumidaspines)
3 Radiolarian Corum sp. cf. C. perfectum (casts only)
4 Radiolarian Xenorum sp. (fragments of cortical shell and primary spines)

Title: Report on Referred Fossils ,  1993 (06/23)
Report by: Charles D. Blome , Katherine M. Reed
Referred by: J. H. Dover
Age: Carnian-Norian (Late Triassic (late Carnian to middle Norian: Capnodoce Zone of Blome, 1984 and Blome and others, 1988))
Formation: Unnamed (Chert interbedded in undated volcaniclastic unit)
Comment:Age: Late Triassic (late Carnian to middle Norian: Capnodoce Zone of Blome, 1984 and Blome and others, 1988).

REFERENCES
Blome, C.D., 1984, Upper Triassic Radiolaria and radiolarian zonation from western North America: Bulletins of American Paleontology, v. 85, no. 318, 88 p.
Blome, C.D., Reed, K.M., and Tailleur, I.L., 1988, Radiolarian biostratigraphy of the Otuk Formation in and near the National Petroleum Reserve area, northern Alaska: U.S. Geological Survey Professional Paper 1399, p. 725-776.

Occurrence(s)
No. Group Name Qty Notes
1 Radiolarian Poorly preserved forms including:
2 Radiolarian ?Canoptum sp. (casts)
3 Radiolarian Capnuchosphaera sp. (isolated tudmidaspines)
4 Radiolarian Corum sp. cf. C. perfectum (casts only)
5 Radiolarian Xenorum sp. (fragments of cortical shell and primary spines)