Sample Detail of
Sample: Sample No. 92AD21A -- USGS No. DR 1515
Locality: Field No. 92AD21A
Description: Howard Pass C-3. Lat 68o 38'2.4" N., Long. 157o 32'45" W. Sample from uppermost m of approx. 5-m-thick chert interval; green, gray, and tan banded chert in 5-cm-thick beds. In thin section, fine-grained, dark, laminated chert containing a few percent spicules and radiolarians. (description from Dover et al., 2004, p. 54 (Table 2); [Formation: Unnamed chert - above Ipnavik unit of Lisburne Gp. -- (possibly) facies equivalent of upper Ipnavik unit. USGS Howard Pass 1:250,000 C3 quadrangle, T. 9 S., R. 24 W., SW 1/4, SW 1/4, sec. 28; near small knob (elev. approx. 640 m) west of unanmed tributary of Cutaway Creek; approx. 4.5 mi west of Pimple Creek and 3.5 mi south of Monument Ridge; same locality as 92AD21B. Lat 68°38'01", long 157°32'42". (description from Blome and Reed E&R report dated June 23, 1993; Shipment no. A-92-9D)]
Location: Alaska Quadrangle: Howard Pass C-3
Township&Range: 9 S. 24 W. Section: 28
Lat.: 68o38'02.4 " 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: 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 26 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 including Capnodoce sp. (partial tests that have broken primary spines) radiolarians identified by C.D. Blome and K.M. Reed
2 Radiolarian Corum sp. (broken tests)
3 Radiolarian ?Pseudosaturniforma sp. (partial cortical ring)

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: Unknown (Unnamed chert - above Ipnavik unit of Lisburne Gp. -- or (possibly) facies equivalent of upper Ipanvik 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 Capnodoce sp. (partial tests with broken primary spines)
3 Radiolarian Corum sp. (broken tests)
4 Radiolarian ?Pseudosaturniforma sp. (partial cortical ring)