Sample Detail of
Sample: Sample No. 91ANs23A -- USGS No. DR 1349
Locality: Field No. 91ANs23A
Description: Howard Pass B-5. Lat. 68o 27'3.6" N., Long. 158o 36'7.2" W. Laminated radiolarian chert in apparent fault contact with graywacke of the Okpikruak Formation. Although the fauna is poorly preserved, the co-occurrence of conptids having 12-14 post-abdominal chambers, such as Canoptum dixoni, as well as abundant Orbiculiforma sp., indicate a definite Early Jurassic age, and a probable Pliensbachian age.
Location: Alaska Quadrangle: Howard Pass B-5
Lat.: 68o27'03.6 " Long.: 158o36'07.2 "
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: No Data
Comment:Age: Early Jurassic (probably Pliensbachian or Toarcian)

Shown as locality 81 on Sheet 2

Occurrence(s)
No. Group Name Qty Notes
1 Radiolarian Radiolarians poorly preserved; most exhibit little or no external meshwork or pore structure radiolarians identified by C.D. Blome and K.M. Reed
2 Radiolarian Canoptum sp. cf. C. dixoni (Pessagno and Poisson)
3 Radiolarian Canoptum sp.
4 Radiolarian ?Canutus sp.
5 Radiolarian ?Katroma sp.
6 Radiolarian Orbiculiforma sp. aff. O. multifora Pessagno and Poisson
7 Radiolarian Orbiculiforma sp.