Reference Detail of

Report on Referred Fossils
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Stratigraphic range: probably all Devonian
Kinds of fossils: Corals
Quadrangle or area: So. Brooks Range, Alaska
Shipment No.: A-60-23
Referred by: Brosge, William P.
Report prepared by: Oliver, William A., Jr.
Date: 02/10/1961

The following age determinations are based on corals only; further refinements may be possible when other groups are studied. Collections in which no corals have been noted are not mentioned.

All of the collections studied are Silurian or Devonian; most are Middle of lower Upper Devonian, and some can be restricted to lower Upper Devonian (Frasnian). With less certainty I would guess that all collections are Middle or lower Upper Devonian.

The collections are discussed in their order of appearance on your request form:


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Brief statement of problem and remarks (from collector):
Does the Skajit ls. include Silurian (Be345, Rr444) and Devonian (Be404, 549F, 555A,B,C) rocks.

Is the limestone in the core of the anticline west of Arctic Village Skajit or a fenster of Lisburne? (Be555D, Rr584).

Is the calcareous sand in the Kanayut Devonian or Mississippian. (Be619)
User Note module to be added
60ABe 555D , Arctic , Orange weathering thin-bedded ls. Possible Kayak or Lisburne.
Cylindrophyllum sp. or
Disphyllum sp.
Disphyllum? sp.
D. or Acinophyllum sp.
60ARr 584 , Arctic , Orange weathering thin-bedded ls. Possible Kayak or Lisburne.
Hexagonaria sp.
Cylindrophyllum sp.
Disphyllum sp.
Tabulophyllum? sp.
Syringopora sp.
Thamnopora sp.
60ARr 420 , Philip Smith Mts , Black limestone 100 to 200 feet thick in shale (750 to 1000 ft. below base of Kanayut). Possible Skajit?.
Hexagonaria? sp.
Cylindrophyllum sp. or
Acinophyllum sp.
Thamnopora sp.
60ARr 451 , Philip Smith Mts , Limestone in shale - probably same as Rr 420. Possible Skajit.
Spongophyllum cf. S. imperfectum Smith, 1945
Macgeea sp. (3 spec.)
cyathophylloid corals (6 spec.)
Syringopora sp.
60ABe 394 , Chandalar , Black ls. and ferruginous ls. interbedded with siltstone and conglomerate.
Macgeea sp.
Tabulophyllum? sp.
Thamnopora sp.
60ABe 404 , Philip Smith Mts , Massive black ls. Top bed of Skajit.
Thamnopora-Cladopora sp.
60ABe 549 , Arctic , Massive black ls.
Disphyllum sp.
Cylindrophyllum? sp.
Acinophyllum or Cylindrophyllum sp.
Acinophyllum? sp.
Favosites sp.
Syringopora sp.
Thamnopora sp.
60ABe 555A , Arctic , Massive black ls.
Thamnopora sp.
60ABe 555B , Arctic , Limestone rubble in 25 ft. black shaly zone directly beneath Be 555A.
Pachyphyllum sp.
Acinophyllum sp.
Amphipora sp.
60ABe 555C , Arctic , Limestone probably in place in the 25 ft. black shaly zone.
Pachyphyllum sp.
Thamnophyllum? sp.