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Ministry of Energy Mines and Responsible for Core Review

BCGS Geoscience Map 2015-02

also released as Geological Survey of Canada Canadian Geoscience Map 209

Surficial geology, Bootjack Mountain area, British Columbia, Parts of NTS 93A/5, A/6, A/11 and A/12

S. Hashmi, A. Plouffe, and B.C. Ward 

Till deposited during the Fraser Glaciation (Late Wisconsinan) is the predominant surficial material in the Bootjack Mountain area. Distributed as a regional blanket, till also defines streamlined, hummocky, and ridged landforms. Glaciofluvial sediments, mainly outwash terraces, mark ice retreat; kame terrace and ice-contact deposits record ice stagnation. Glaciolacustrine deposits form veneers and blankets along Beaver Valley. Holocene colluvial and alluvial sediments are exposed along the Beaver, Quesnel, and Cariboo river valleys. The colluvium forms blankets, veneers, aprons, landslide, and hummocky deposits, whereas the alluvium forms terraces, plains, and fans. Meltwater channels align mainly along the general ice-flow direction (northwest-southeast). Northwest-trending ice-flow indicators (293°–330°) overprint those trending west-southwest (255°–275°), indicating two glacier movement directions.



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Links to Geological Survey of Canada (metadata and shape files)




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