Geology of southwestern Alaska

Decker, John; Bergman, Steven C.; Blodgett, Robert B.; Box, Stephen E.; Bundtzen, Thomas K.; Clough, James G.; Coonrad, W.L.; Gilbert, W.G.; Miller, Mark M.; Murphy, Janice M.; Robinson, M. S.; Wallace, Wesley K.

doi:10.1130/dnag-gna-g1.285

Cited by 32 publications

(42 citation statements)

References 27 publications

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“…4). We agree with Decker et al (1994) that these three subterranes are depositionally related, but retain the subterrane terminology herein because there is no workable stratigraphic nomenclature that encompasses all the rocks under discussion. New and previously published lithologic and faunal data that bear on the origin of the Farewell terrane are summarized in the following.…”

Section: Central Alaskamentioning

confidence: 53%

“…Lithologic details presented here are from Dutro and Patton (1982), Dumoulin et al (1999Dumoulin et al ( , 2000b, Decker et al (1994), Measures et al (1992), and our own observations (Fig. 3, column 7).…”

Section: Lithofaciesmentioning

confidence: 83%

“…Shallow-and deep-water facies in both terranes are overlain by heterogeneous, Devonian through Cretaceous lithologies of the Mystic terrane. Decker et al (1994) established the Farewell terrane, which they interpreted as a coherent, but locally highly deformed, continental margin sequence, to include all of these units. This interpretation has been widely accepted, but which continent the sequence formed along remains the subject of much debate.…”

Section: Central Alaskamentioning

confidence: 98%

“…This interpretation has been widely accepted, but which continent the sequence formed along remains the subject of much debate. Some have suggested that the Farewell terrane is a displaced fragment of the North American continental margin (Decker et al, 1994), whereas others believe that it rifted away from the Siberian craton (Blodgett, 1998).…”

Section: Central Alaskamentioning

confidence: 99%

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Lithostratigraphic, conodont, and other faunal links between lower Paleozoic strata in northern and central Alaska and northeastern Russia

Dumoulin¹,

Harris²,

Gagiev³

et al. 2002

Tectonic Evolution of the Bering Shelf-Chukchi Sea-Artic Margin and Adjacent Landmasses

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Lower Paleozoic platform carbonate strata in northern Alaska (parts of the Arctic Alaska, York, and Seward terranes; herein called the North Alaska carbonate platform) and central Alaska (Farewell terrane) share distinctive lithologic and faunal features, and may have formed on a single continental fragment situated between Siberia and Laurentia. Sedimentary successions in northern and central Alaska overlie Late Proterozoic metamorphosed basement; contain Late Proterozoic ooid-rich dolostones, Middle Cambrian outer shelf deposits, and Ordovician, Silurian, and Devonian shallow-water platform facies, and include fossils of both Siberian and Laurentian biotic provinces. The presence in the Alaskan terranes of Siberian forms not seen in wellstudied cratonal margin sequences of western Laurentia implies that the Alaskan rocks were not attached to Laurentia during the early Paleozoic.The Siberian cratonal succession includes Archean basement, Ordovician shallow-water siliciclastic rocks, and Upper Silurian-Devonian evaporites, none of which have counterparts in the Alaskan successions, and contains only a few of the Laurentian conodonts that occur in Alaska. Thus we conclude that the lower Paleozoic platform successions of northern and central Alaska were not part of the Siberian craton during their deposition, but may have formed on a crustal fragment rifted away from Siberia during the Late Proterozoic. The Alaskan strata have more similarities to coeval rocks in some peri-Siberian terranes of northeastern Russia (Kotelny, Chukotka, and Omulevka). Lithologic ties between northern Alaska, the Farewell terrane, and the peri-Siberian terranes diminish after the Middle Devonian, but Siberian afµnities in northern and central Alaskan biotas persist into the late Paleozoic. *

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Section: Central Alaskamentioning

confidence: 53%

Section: Lithofaciesmentioning

confidence: 83%

Section: Central Alaskamentioning

confidence: 98%

Section: Central Alaskamentioning

confidence: 99%

See 2 more Smart Citations

Lithostratigraphic, conodont, and other faunal links between lower Paleozoic strata in northern and central Alaska and northeastern Russia

Dumoulin¹,

Harris²,

Gagiev³

et al. 2002

Tectonic Evolution of the Bering Shelf-Chukchi Sea-Artic Margin and Adjacent Landmasses

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show abstract

“…The Holokuk Basalt (Cady and others, 1955) (Bundtzen and Laird, 1982;Bundtzen and Laird, 1983;Bundtzen and Laird, 1992;Bundtzen and others, 1992;Decker, 1994;Moll-Stalcup, 1994).…”

Section: Stratigraphy Agementioning

confidence: 99%