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• W2557318765 abstract "On the northwest side of the Paleoproterozoic Baker Lake basin the Christopher Island Formation, comprising volcanic flows intercalated with alluvial fan and pyroclastic rocks, unconformably overlies Archean gneiss. It is unconformably overlain by the Amarook Formation (new name), a well indurated sandstone characterized by large-scale crossbedding of probable eolian origin, and interbedded alluvial sandstone and conglomerate. The Amarook Formation correlates with similar strata recognized in drill core and outcrop from the eastern Thelon Basin. The disconformably overlying Pitz Formation includes lower volcanic and upper sedimentary members. The upper member correlates with strata mapped as basal Thelon Formation in the Thelon Basin. Lower Dubawnt Supergroup rocks are offset by a series of northwest-striking dextral faults that may predate deposition of the overlying Barrensland Group. A possible strike-parallel fault may be responsible for repetition of lower Dubawnt strata in the southern part of the study area. 1 Contribution to the Western Churchill NATMAP Project 1 Resume : Sur le cote nord-ouest du bassin paleo-proterozoique de Baker Lake, la Formation de Christopher Island, qui comporte des coulees volcaniques intercalees a des roches pyroclastiques et a des roches de cones alluviaux, recouvre en discordance du gneiss archeen. Elle est recouverte en discordance par la Formation d’Amarook (nouveau nom), un gres bien indure caracterise par une stratification oblique a grande echelle, probablement d’origine eolienne, avec des interlits de gres alluvionnaire et de conglomerat. Une correlation existe entre la Formation d’Amarook et des strates similaires reconnues dans des carottes de forages et des affleurements dans l’est du Bassin de Thelon. La Formation d’Amarook est recouverte en discordance par la Formation de Pitz, qui comprend un membre inferieur volcanique et un membre superieur sedimentaire. Le membre superieur peut etre mis en correlation avec des strates qui ont ete assignees a la base de la Formation de Thelon dans le Bassin de Thelon. Les roches inferieures du Supergroupe de Dubawnt sont decalees par une serie de failles dextres a orientation nord-ouest qui pourraient etre anterieurs a la mise en place du Groupe de Barrensland sus-jacent. Il est possible qu’une faille parallele a la direction soit responsable de la repetition des strates inferieures du Supergroupe de Dubawnt dans la partie meridionale de la region d’etude." @default.
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• W2557318765 date "2000-01-01" @default.
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• W2557318765 title "Revised stratigraphy and sedimentology of the Paleoproterozoic Dubawnt Supergroup at the northern margin of Baker Lake Basin, Nunavut" @default.
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• W2557318765 doi "https://doi.org/10.4095/211102" @default.
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