Reference Detail of

Report on Referred Fossils
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Stratigraphic range: Pennsylvanian
Kinds of fossils: Ammonoid
Quadrangle or area: Killik River Quad., Brooks Range
Shipment No.: A-77-12
Referred by: Tailleur, Irv L.
Report prepared by: Gordon, Mackenzie, Jr.
Date: 07/15/1977

This report is based on one half of an ammonoid which has broken in two and shows a fairly good cross section, also a supposed belemnoid. Someone has previously ground part of one side of the ammonoid to expose the suture. The flanks are flat and the venter well rounded; no ventral ribbing is present. The first lateral lobe of the suture is indented by a narrow saddle to about one half its length. The entire suture, as nearly as can be discerned in the cross section has 22 lobes in all.

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75ATr46.1 (26898-PC) , Killik River , The specimen is from a red clay/shale bank above a chert cutbank on the east side of middle Otuk Creek. The fossils are from concretions in red clay shale adjacent to a thick nonmafic chert-tasmanite (cannal coal unit) which is undated but post-Mississippian and pre-Cretaceous.
Pseudopronorites cf. P. arkansiensis (Smith)