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Ministry of Energy Mines and Responsible for Core Review

Preliminary Map No. 45: Geology of the Kelowna Tertiary Outlier (East Half)(082E/14W)

by B.N. Church, 1981

View Map (PDF, 1.2 MB) (1:50 000)


Preliminary Map 45 describes the geology of the Kelowna Tertiary outlier (east half) along the north side of Okanagan Lake in southern British Columbia.  The 1:50 000 scale geology map includes a legend and cross sections.  It adjoins Preliminary Map 39


The basement rocks to the Tertiary sequence consists of pre-Cenozoic sediments, including argillaceous rocks, limestone, and metavolcanic rocks, schistose and gneissic units, and mainly granitic intrusions of the Early Cretaceous to Late Jurassic Okanagan batholith.  Early Cenozoic rocks of the Kettle River Formation, the Marron Formation, and the White Lake Formation are exposed.  The Kettle River Formation consists of a lower siltstone and sandstone unit, a central rhyolitic lava and breccia unit, and the Black Knight dacite lava and breccia unit.  The Marron Formation has a lower andesitic flow and breccia unit, the Kitchley Lake member, which is made up of trachyte and trachyandesite lava flows, and the Nimpit Lake member with mainly trachyte and trachyandesite lava flows.  The White Lake Formation consists of sandstone and siltstone with some carbonaceous seams.  The much younger Daves Creek plateau basalt (14.9 Ma) also occurs.


Block faults with mainly north-northeast and northwest trends dominate the Tertiary map pattern.

The area is prospective for epithermal precious metal deposits.


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