Reference Detail of

Report on Referred Fossils
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Stratigraphic range: Lower Permian
Kinds of fossils: Ammonoids
Quadrangle or area: Mount Hayes A-2, E. Alaska Rg.
Shipment No.: A-74-12
Referred by: Dutro, J. Thomas, Jr. , Richter, Donald H.
Report prepared by: Gordon, Mackenzie, Jr.
Date: 03/09/1976

Thus in the two levels of the Mankomen Formation, we have four ammonite genera, all represented by specimens showing sutures. The genera can be recognized and the species approximated, but one can not yet assign either level as to Sakmarian or Artinskian age. That it is Lower Permian in the classical sense, there is no doubt.

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74ARh114 (26310-PC) , Mt Hayes , USGS colln. 26310 (field no. 74ARh114) Mount Hayes A-2 quad., Alaska. Chistochina Valley, eastern Alaska Range. No detailed locality data given. Mankomen Formation, lower argillite unit. Collectors, J. T. Dutro, Jr. and D. H. Richter, 1974.
Daubichites sp. indet.
Peritrochia aff. P. typica (Ruzhencev)
74ARh123 (26311-PC) , Mt Hayes , USGS colln. 26311-PC (field no. 74ARh123) Mount Hayes A-2 quad., Alaska. Chistochina Valley, eastern Alaska Range. No detailed locality data given. Mankomen Formation, upper argillite unit. Collectors, J. T. Dutro and D. H. Richter, 1974.
Paragastrioceras cf. P. kirgizhorum Voinova
Uraloceras cf. U. federowi (Karpinsky)