Geologic map of the Demarcation Point Quadrangle, Alaska

Reiser, H.N.; Brosge, W.P.; Detterman, Robert L.; Durto, J.T.

doi:10.3133/ofr78526

Cited by 14 publications

(46 citation statements)

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“…Whereas reconnaissance maps compiled by the United States Geological Survey have the "Neruokpuk" restricted to an individual lithologic unit as defined by Leffingwell (Reiser et al 1978), Canadian usage has focused on the presumed Proterozoic age, as opposed to a particular mappable unit. This is explicitly enunciated by D. K. Norris (1985a, p. 225), where he considers the fossiliferous calcareous siltstone-sandstone unit of Dutro et al (1972) as being within the restricted Neruokpuk definition, in contrast with Reiser et al (1980) who exclude it. Further, Noms considers his Pn4 unit as being approximately correlative with Leffingwell's Neruokpuk (Fig.…”

Section: Later Reconnaissancementioning

confidence: 93%

“…Comparison of the adjoining Yukon and Alaska regional maps (Reiser et al 1980; K. Norris 1981a, 19856) illustrates the current divergent views on pre-Mississippian stratigraphic interpretations ( Fig. 1) arising, in large part, from application of contrasting Neruokpuk terminology.…”

Section: Later Reconnaissancementioning

confidence: 96%

“…3). Although some of the unit Pn3, the unit thought to be equivalent to the fossiliferous Alaskan units were interpreted by Reiser et al (1980) (1972) and Reiser et al (1980) interpreted the opposite (sequences B and C, Fig. 2; see Fig.…”

Section: Later Reconnaissancementioning

confidence: 99%

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The pre-Mississippian "Neruokpuk Formation," northeastern Alaska and northwestern Yukon: review and new regional correlation

Lane¹

1991

Can. J. Earth Sci.

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Since the early 1900's, regional reconnaissance in Alaska and the Yukon has failed to resolve the stratigraphy and structure of the pre-Mississippian Neruokpuk Formation. Its age and distribution have been defined and redefined as new data have slowly accumulated. In most recently published reconnaissance maps of the Yukon, the "Neruokpuk" includes nearly all of the pre-Mississippian strata in the British Mountains and is assigned a Precambrian age. In contrast, approximately half of contiguous strata in adjacent Alaska are interpreted as early Paleozoic in age and are excluded from the Neruokpuk. Recent detailed studies in the Firth River area of the Yukon have documented intense small-scale imbrication of fossiliferous Lower Cambrian to Devonian(?) units that were previously mapped as Precambrian Neruokpuk.A remarkable similarity between the lithologies of lower Paleozoic rocks in the British Mountains and the Selwyn Basin 1000 km to the southeast is strengthened by biostratigraphic ties in Lower Cambrian, Lower Ordovician, and Lower Silurian strata. This correlation between basin facies suggests that shelf and slope facies of upper Proterozoic through lower Paleozoic strata may also be correlatable between the two areas. The paleogeographic implications of these correlations indicate that pre-Mississippian strata in Arctic Alaska and the Yukon are part of a single Arctic–Pacific continental margin.The Neruokpuk Formation name should be restricted in Canada to the quartzite-dominant unit, contiguous with similar strata to which the restricted Neruokpuk definition applies in Alaska. The current broad definition, based on an assumed Proterozoic age but including many rock types, should be discontinued.

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Section: Later Reconnaissancementioning

confidence: 93%

Section: Later Reconnaissancementioning

confidence: 96%

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The pre-Mississippian "Neruokpuk Formation," northeastern Alaska and northwestern Yukon: review and new regional correlation

Lane¹

1991

Can. J. Earth Sci.

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“…In both provinces pre-Mississippian contractional deformation is recorded by a major angular unconformity separating the Franklinian rocks from the overlying Ellesmerian sequence (Brosgé et al, 1962;Reiser et al, 1971Reiser et al, , 1980. In most locations the Mississippian Kekiktuk Conglomerate directly overlies penetratively deformed and metamorphosed rocks (Brosgé et al, 1962;Oldow et al, 1987); however, in the Shublik and Sadlerochit Mountains the angularity of the unconformity is more subtle (Robinson et al, 1989).…”

Section: North Slope and Northeast Brooks Rangementioning

confidence: 94%

Regional stratigraphy of the Brooks Range and North Slope, Arctic Alaska

Handschy¹

1998

Architecture of the Central Brooks Range Fold and Thrust Belt, Arctic Alaska

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The stratigraphy of northern Alaska records a complex paleogeographic and tectonic history. In general, the pre-Mississippian stratigraphic section is more complicated and controversial than the younger strata. It records a long period of mixed carbonate and clastic deposition, at least one pre-Mississippian collisional orogenic event, and a Late Devonian rifting event. Mississippian to Jurassic depositional patterns reflect the evolution of a south-facing passive margin, whereas Late Jurassic and younger sedimentation was controlled by plate convergence and formation of the Brooks Range fold-thrust belt. Understanding the paleogeographic distribution of stratigraphic facies in the Brooks Range is critical for deciphering the palinspastic history of the Brookian fold-thrust belt.

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“…The Franklinian sequence consists of metamorphosed clastic and carbonate rocks (Reiser et al, 1978). The Ellesmerian sequence records the northward retreat of the coast line and the shallow-marine and nonmarine clastic sedimentation (Collett et al, 1988).…”

Section: Site Geologymentioning

confidence: 99%