Report on Referred Fossils |
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Stratigraphic range: |
Devonian |
Kinds of fossils: |
Marine invertebrates |
Quadrangle or area: |
Arctic and Philip Smith quads., Northern Alaska |
Shipment No.: |
A-60-27 |
Referred by: |
Brosge, William P.
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Report prepared by: |
Dutro, J. Thomas, Jr.
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Date: |
12/13/1961 |
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(in consultation with W. A. Oliver, Jr.) This report covers 12 collections, something over 150 specimens, from the Brooks Range. The Famennian age of at least a part of the Kanayut conglomerate is supported. The Frasnian age of the slate-sandstone unit is strengthened, and the collection from the limestone-siltstone does not change the earlier dating as probable Frasnian (see report on A-60-24 of 12/11/61). The suggestion that the Skajit limestone straddles the Middle Devonian-Upper Devonian boundary is again indicated. In this case, collection Be 684 contains a trilobite, Scutellum, like that described from the Tully of New York. W. A. Oliver, Jr. previously reported on the corals (see report of 2/27/61); his identifications are included here to complete the fossil assemblages.
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*** Brief statement of problem and remarks (from collector): Is Be 728 basal Siksikyuk or the base of a thrust plate of Devonian shale resting on Lisburne? Is RR613 Kayak or Sadlerochet? Are RR699 & 660 Lisburne or Devonian limestone like 60ABe 555 D and Be 557 of previous shipment? Is RR613 Kayak or Devonian?
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User Note module to be added |
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60ABe 683
, Philip Smith Mts
, Black shaly limestone in dark gray silt shale and shaly sandstone. Upper graywacke, slate quartzite unit of Devonian slate-sandstone. (18.92 x 5.40 P. Smith). [description from transmittal sheet of W.P. Brosge, Oct. 27, 1960]
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syringoporoid coral, indet.
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cchinoderm debris, indet.
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60ABe 681
, Philip Smith Mts
, E. Shale and quartzite . . . . . . . . 1004 ft. D. Black shale and thin bedded ...dark gray quartzite . . . 15 ft. C. Limestone, dark gray, coarse-grained, thin-bedded, ferruginous, contains shale chips. 25 ft. B.Sandstone, light yellow coarse, gritty, thin-bedded . . . 10 ft. A. Limestone gray, crystalline, thick-bedded . . 504 ft. Fossils from unit C. Units B-C probably thin section of Devonian limestone-siltstone unit. (19.08 x 3.68 P. Smith). [description from transmittal sheet of W.P. Brosge, Oct. 27, 1960]
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spiriferoid brachiopod, indet.
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60ABe 684
, Philip Smith Mts
, Limestone, medium gray, sphanitic, rough weathering. (18.37 x 5.51 P. Smith) [description from transmittal sheet of W.P. Brosge, Oct. 27, 1960]
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echinoderm debris, indet.
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cyathophylloid coral, indet.
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massive stromatoporoid, undet.
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60ABe 688
, Arctic
, Thin red-weathering limestone in conglomerate. Probably not fault slice. Kanayut. (0.68 x 5.76 Arctic). [description from transmittal sheet of W.P. Brosge, Oct. 27, 1960]
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spiriferoid brachiopod, indet.
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bivalve shell fragments, indet.
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60ABe 734
, Arctic
, Ferruginous sandstone in gray-green slate directly beneath conglomerate. Devonian slate-sandstone. (16.49 x 10.59 Arctic). [description from transmittal sheet of W.P. Brosge, Oct. 27, 1960]
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bivalve shell fragments, indet.
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60ABe 745
, Arctic
, Calcareous sandstone in graywacke. Paddle Mtn. Upper graywacke, slate quartzite unit of Devonian slate-sandstone. (8.56 x 2.63 Arctic). [description from transmittal sheet of W.P. Brosge, Oct. 27, 1960]
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echinoderm debris, indet.
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rhynchonelloid brachiopods, indet.
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60ABe 741
, Arctic
, Silty limestone and calcareous silt in muddy slate and graywacke. Upper graywacke, slate quartzite unit of Devonian slate-sandstone. (13.63 x 7.45 Arctic). [description from transmittal sheet of W.P. Brosge, Oct. 27, 1960]
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spiriferoid brachiopod, indet.
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60ARr 642
, Arctic
, Calcareous sandstone and ferruginous limestone in slate at contact with mafic flow. Upper graywacke, slate quartzite unit of Devonian slate-sandstone. (14.55 x 1.69 Arctic). [description from transmittal sheet of W.P. Brosge, Oct. 27, 1960]
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rhynchonelloid brachiopod, indet.
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spiriferoid brachiopod, indet.
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60ARr 642Z
, Arctic
, Bouldered. Same calcareous sandstone as RB642 within mafic flow. Upper graywacke, slate quartzite unit of Devonian slate-sandstone. (14.55 x 1.69 Arctic). [description from transmittal sheet of W.P. Brosge, Oct. 27, 1960]
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chonetid brachiopod, indet.
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rhynchonelloid brachiopod, indet.
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bivalve fragments, indet.
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60ARr 649
, Arctic
, Gray-green fine- to medium-grained ferruginous calcareous sandstone like RR642. Upper graywacke, slate quartzite unit of Devonian slate-sandstone. (15.60 x 1.70 Arctic). [description from transmittal sheet of W.P. Brosge, Oct. 27, 1960]
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bivalve fragments, indet.
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60ARr 719
, Arctic
, Silicified limestone at greenstone contact. (5.00 x 0.07 Arctic). [description from transmittal sheet of W.P. Brosge, Oct. 27, 1960]
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60ABe 769
, Arctic
, Limestone, dark- to medium-gray, fine-grained to sublithographic. (8.08 x 1.88 Arctic). [description from transmittal sheet of W.P. Brosge, Oct. 27, 1960]
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echinoderm debris, indet.
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massive stromatoporoid, undet.
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