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.

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.

Grantor dc:publisher

Université d'Ottawa / University of Ottawa

Year dc:date

2016

Author dc:creator

• Popovic, Natasa

Contributors dc:contributor

• Arnott, Robert

• sedimentology
• matrix-rich
• turbidites
• avulsion
• lateral trends
• basin floor

Language dc:language

en

Identifier

http://dx.doi.org/10.20381/ruor-5312

OAI identifier oai:identifier

oai:ruor.uottawa.ca:10393/34496