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Reference
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| Title: |
New occurrences of Late Paleozoic and Triassic fossils from the Seventymile and Yukon-Tanana terranes, east-central Alaska, with comments on previously published occurrences in the same area
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2003
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Abstract - The discovery of several new fossil occurrences of late Paleozoic conodonts and radiolarians in the Seventymile and Yukon-Tanana terranes, and of Late Triassic conodonts in the Seventymile terrane in east-central Alaska, has prompted a reevaluation of other late Paleozoic and Triassic fossils reported in the same areas. The report, in 1995, of giant parafusulinids in the Seventymile terrane within the same stratigraphic interval that more than 20 years before produced poorly preserved Permian brachiopods helped place these beds in the middle Guadalupian and to position the terrane at tropical to subtropical latitudes near ancestral North America during the Middle Permian. ..... |
| Report by: |
Cynthia Dusel-Bacon
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Anita G. Harris
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| | Age: | Osagean-Meramecian (probably Osagean or Meramecian) |
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| Comment: | Shown as fossil locality 10 in Figure 2. Age: Osagean or younger Mississippian, probably Osagean or Meramecian (late Early-early Late Mississippian) (from p. 14) Remarks: Albaillellas are common and fairly diverse, though quite poorly preserved. (from p. 14) The third radiolarian collection is from red-and-gray chert overlain by massive greenstone in the Seventymile terrane, southeastern Charley River quadrangle (loc. 10, fig. 2; table 1). The fauna is poorly preserved, consisting maily of Albiallella, spheroidal spumellarians, and sponge spicules. B.L. Murchey, who reexamined the collection in 2002, agreed with her original faunal list and age assignment to the Osagean or younger Mississippian, probably Osagean or Meramecian (late early or early late Mississippian). (from p. 19) |
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