Sample Detail of
Sample: Sample No. 80EK107 -- USGS No. 27118-PC
Locality: Field No. 80EK107
Description: From sec. 19, T. 57 S., R. 74 E., Petersburg D-6 quad., logging road borrow pit SE of lake, Kupreanof Island, Pybus Formation, submitted as Permian (Leonard?). Partly dolomitic chert-bearing limestone of Pybus Formation; more than 30 m above base of Pybus Formation.
Location: Alaska Quadrangle: Petersburg D-6
Township&Range: T57S R74E Section: 19
Lat.: 56o54'46 " Long.: 133o48'30 "
Reference
Title: Report on Referred Fossils ,  1980 (10/07)
Report by: Anita G. Harris
Referred by: David A. Brew , Inyo Ellersieck , Susan M. Karl
Age: Early Permian (Early Permian (Leonardian))
Formation: Pybus Formation
CAI:Min: 1.5 (CAI=1-1/2 indicating host rock reached 60-90 deg. C.
4.72 kg of carbonate was processed for conodonts (93 g of +20 mesh insoluble residue).)
Comment:The collection is of Permian age and if my identification of N. idahoensis is correct (the specimens are good, the query merely indicates my own insecurity) then the collection is of Leonard age. I am sending the slide to Bruce Wardlaw for his evaluation.
AGE: Early Permian (probably Leonardian)
CAI=1-1/2 indicating host rock reached 60-90o C.
4.72 kg of carbonate was processed for conodonts (93 g of +20 mesh insoluble residue).
Occurrence(s)
No. Group Name Qty Notes
1 Conodonts Hindeodus sp. 1 anterior fragment of a p element
2 Conodonts Neogondolella idahoensis (Youngquist, Hawley & Miller) 4 p elements (2 complete to nearly complete and 2 fragments)

Title: Report on Referred Fossils ,  1983 (03/09)
This report covers the 9 collections in this shipment containing Carboniferous and Permian megafossils. Six of these collections are Early Permian, one is Pennsylvanian and two are possibly Carboniferous. The most significant collection is 80SK500B (USGS 27714-PC) from Muffler's crinoidal limestone (Cl). This collection has many more kinds of fossils than similar old collections and is definitely of Pennsylvanian age. Of the Muffler collections from the same unit, I can now say that 63AMp590 is possibly so, although it has very few fossils in it. Consequently, this unit is correlative to the Klawak or Ladrones Limestones of Prince of Wales Island, and possibly also with the chert and limestone member and part of the silty limestone member of the Saginaw Bay Formation. Muffler's collection 63AMp343 is also Pennsylvanian. As other collections from the silty limestone member contain probable early Permian fusulinids, that member is Pennsylvanian and early Permian in age. Fusulinids from the Halleck Formation are late Wolfcampian, according to R.C.Douglass (see his report dated 12/29/80). The Permian Pybus Formation collections in this shipment contain brachiopods faunas that are Leonardian. Consequently, all the current evidence indicates that the Halleck and Pybus Formations are Lower Permian.
Report by: J. Thomas Dutro , Jr.
Referred by: David A. Brew
Age: Early Permian (Early Permian (Leonardian))
Formation: Pybus Formation
Comment:The large Spiriferella is common in the Pybus Formation and indicates a Leonardian age.
Occurrence(s)
No. Group Name Qty Notes
1 Echinoderms echinoderm debris, indet.
2 Bryozoans fenestrate bryozoans, indet.
3 Bryozoans stenoporoid bryozoans, indet.
4 Brachiopods productoid fragments, indet.
5 Brachiopods Spiriferella sp. (large)
6 Brachiopods Hustedia? sp.
7 Brachiopods Reticulariina? sp.