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oai:ruor.uottawa.ca:10393/344962024-02-23T08:59:37Zcom_10393_242col_10393_11105

Sedimentology and Stratigraphy of a Matrix-Poor to Matrix-Rich Depositional Continuum in Proximal Basin Floor Strata, Upper Kaza Group, Windermere Supergroup, B.C., Canada. Popovic, Natasa Arnott, Robert sedimentology matrix-rich turbidites avulsion lateral trends basin floor Matrix-rich strata (20-70% mud matrix) have been increasingly recognized in deep-marine systems. These beds are thought to be deposited from mud-rich flows in a distal basin-floor setting; however they remain poorly understood, partly because details of lateral lithological changes are poorly known. In this study, matrix-rich strata are common in proximal basin-floor strata of the Neoproterozoic Windermere Supergroup. The objective of this thesis is to provide detailed description and interpretation of the lithological and mineralogical make-up and lateral facies trends of matrix-rich strata in in a unit 40 m thick and 800 m wide. Here, stratigraphic and petrographic analyses identified five facies: classic turbidites; sandstones; clayey sandstones; sandy claystones and fine-grained banded couplets, which laterally are arranged systematically from matrix-poor sandstones to thin-bedded turbidites. This lateral change is interpreted to represent a depositional continuum along the margins of an efflux jet that formed immediately downflow of an avulsion node. 2016-04-12T19:25:47Z 2016-04-12T19:25:47Z 2016 Thesis http://hdl.handle.net/10393/34496 http://dx.doi.org/10.20381/ruor-5312 en application/pdf Université d'Ottawa / University of Ottawa