of
Sample: Sample No. 58ACo272
Locality: Field No. 58ACo272
Description: Transmittal sheet of E.H. Lathram, dated May 1, 1959, provides following: "Green siltstone (locally reddish) with calcareous nodular portions. Overlain by massive limestone underlain by siliceous and nodular limestones interbedded Silurian or Devonian. Juneau D-5 Coords (1.3, 7.6)
Location: Alaska Quadrangle: Juneau D-5
Reference
Title: Report on Referred Fossils ,  1960 (11/07)
This report supplements those of W.A. Oliver, Jr. (dated 8/18/59) and Serge Mamay (dated 6/1/59). Additional brachiopods and molluscs in collections 58(?)AMr387 permit a refinement of the age designation of that collection. It is either of latest Middle Devonian or earliest Late Devonian age. Collection 58AL88 contains linguloid brachiopods, perhaps assignable to the genus Barroisella, that suggest a Middle or Late Devonian age.

E&R report prepared by J.T. Dutro, Jr., in consultation with E.L. Yochelson

Report by: J. Thomas Dutro , Jr. , Ellis L. Yochelson
Referred by: E. H. Lathram
Age: No Data
Comment:In addition to the corals, this collection contains only indeterminate brachiopod and echinoderm fragments. No refinement of the age assingment given by Oliver can be made.
Occurrence(s)
No. Group Name Qty Notes
1 Brachiopods indeterminate brachiopod fragments
2 Echinoderms echinoderm fragments

Title: Report on Referred Fossils ,  1959 (08/18)
The following is a report on the corals in the submitted collections. Brachiopods, which may provide additional age date will be separately reported on at a later date.

Age determinations may be summarized as follows:

Coll. 33 & 53AMr387 [note by R.B. Blodgett, this should be 58AMr387] - Silurian or Devonian
Coll. 58APy183 - Post-Devonian Paleozoic; will be reported on by Helen Duncan
Coll. 58ACo271 - Silurian
Coll. 58ACo272 - Silurian, Lower Devonian or Middle Devonian
Coll. 58ACo274 - Silurian, probably Lower or Middle Silurian
Coll. 58ACo291 - Silurian

Report by: William A. Oliver , Jr.
Referred by: E. H. Lathram
Age: Early Silurian-Middle Devonian
Comment:Heliolites ranges from the Lower Silurian to the Middle Devonian and the age of the collection must fall within this range. The Favosites is different from those in the other collections and is of little use here for age determination.
Occurrence(s)
No. Group Name Qty Notes
1 Tabulate Corals Favosites sp. 5 1 fragment
2 Heliolitid Corals Heliolites sp. 2 1 fragment
3 Crinoids crinoid columnals