An integrated chemostratigraphic and biostratigraphic framework and benthic foraminifera morphogroup response to paleoenvironmental conditions of the Upper Cretaceous Kanguk Formation, Canadian Arctic Archipelago

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  • The Kanguk Formation, investigated at two localities on Ellesmere Island, Nunavut, Canada, is a unit of dominantly shales and siltstones deposited within the Sverdrup Basin that records the Late Cretaceous history of the Polar Sea. Two foraminiferal biostratigraphic zones with refined ages are proposed, the Turonian to late Santonian Evolutinella boundaryensis Zone and the late Santonian to Campanian Verneuilinoides bearpawensis – Glayphrammina spirocompressa Zone, which correlate to established zonations in the Arctic region. The carbon isotope record places the basal Kanguk boundary into the lower Turonian above the Oceanic Anoxic Event 2, confirming a younger age of this boundary towards the eastern basin margin. Benthic foraminiferal morphogroup assemblage changes are linked to global transgressive-regressive cycles and paleoredox conditions. Oxygen-limited, Trochammina-dominated assemblages or the complete loss of taxa characterize highstand intervals, due to enhanced primary production and an expanded oxygen minimum zone.

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  • Copyright © 2016 the author(s). Theses may be used for non-commercial research, educational, or related academic purposes only. Such uses include personal study, research, scholarship, and teaching. Theses may only be shared by linking to Carleton University Institutional Repository and no part may be used without proper attribution to the author. No part may be used for commercial purposes directly or indirectly via a for-profit platform; no adaptation or derivative works are permitted without consent from the copyright owner.
Date Created
  • 2016


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