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Reference
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| Title: |
Report on Referred Fossils
,
1962
(01/25)
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(in consultation with H. M. Duncan) This report covers 13 collections. Ten, comprising more than 250 specimens, [are] from post-Devonian rocks of the southern Brooks Range. Three other collections are pre-Mississippian. The single collection from the Siksikpuk formation contains the typical Early(?) Permian assemblage found at many localities in the lower part of the unit. The Straparollus is definitive, in this instance. Four collections from the Lisburne group appear to represent the Wachsmuth limestone. Collection Rr754 is probably upper Wachsmuth while Rr611 and Be733 are most likely lower Wachsmuth. Nothing really definitive can be said about Rr659. Three collections submitted as possible Mississippian are more likely of Devonian age. They are Rr660, Be722 and Be724. A supplemental report by W. A. Oliver will follow. Four collections represent the Kayak shale. Of these, Rr613 and Rr611A contain typical assemblages of early Mississippian fossils found elsewhere in this formation in the central Brooks Range. The final collection, Be682, contains a mixture of Kayak and Wachsmuth rock types as indicated in the transmittal forms. |
| Report by: |
J. Thomas Dutro
, Jr.
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| Referred by: |
William P. Brosge
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| | Age: | No Data |
| Formation: | Lisburne Group (Lisburne Group(?)) |
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| Comment: | Presumably Lower Paleozoic. Does not appear to have features characteristic of Carboniferous or Permian genera. |
| Occurrence(s) |
| No. |
Group |
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Name |
Qty |
Notes |
| 1 |
Corals |
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colonial coral, poorly preserved. |
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| Title: |
Report on Referred Fossils
,
1960
(11/14)
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[Note by Ning Zhang: Date of the report was not given; Date of material recieved is used instead.] |
| Report by: |
Helen Duncan
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| Referred by: |
William P. Brosge
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| | Age: | Late Mississippian |
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| Rock Type: | Primary: Carbonate |
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| Comment: | This colonial coral with very small corallites is very poorly preserved. However, the hand specimen and thin sections Mr. Oliver had prepared show indications of a columella in a few corallites and the tabulae are apparently domed. Dissepiments seem to be lacking; and, so far as one can tell from the sections, the columella was probably impersistent or possibly lacking in most corallites. Lithostrotion junceum (Fleming) is the only Carboniferous species I know of that might exhibit this combination of characters. L. junceum is characteristic of the upper Visean and lowermost Namurian in the British Carboniferous section. I have not seen it in any collections from Alaska, but the Brooks Range Mississippian material that I have studied in detail presumably represents horizons older than the Dibunophyllum zones. I want to emphasize, however, that the preservation of this coral is so deplorable that if it is mentioned in your report I think it should be referred to as: ?Lithostrotion junceum (Fleming) The coral could be Mississippian, but at this point I would not attach any particular significance to it as a zone fossil in the Alaskan Mississippian. Phaceloid lithostrotionoids appear later than the cerioid forms, however; and from what we know of their stratigraphic distribution, this occurrence should be in the Upper Mississippian. |
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