Government of Canada: Natural Resources Canada
 
 
Geological Survey of Canada
Calgary

 

 

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The Central Foreland NATMAP Project

 

ABSTRACT
 
A GIS dataset of geological features for the Kluachesi Lake map area (94G/13), Peace River District, British Columbia.  
 

Abstract: This geological map and database are derived from regional mapping in the Kluachesi Lake (NTS 94G/13) 1:50 000 scale map area, as part of the Geological Survey of Canada's Central Foreland NATMAP project. Geological features represented by attributed points, lines, and polygons have been compiled into a GIS dataset suitable for stand-alone use, or integration with other data sets. User-defined attributes provide traditional geological map information with greater detail and enhancements such as explicit orientation data, lithologies, and sample localities.

      The Kluachesi Lake map area is situated within the Rocky Mountain Foothills of the Foreland Belt in northeast British Columbia. The geology of the area is dominated by folded strata of Devonian through Cretaceous age. At this latitude the foothills narrow to a band 25 km wide with a dominant north-northwest trend. The most notable fold structure is the Muskwa Anticlinorium, delineated by exposures of the Carboniferous Prophet Formation in the central portion of the map area. This relatively broad structure is approximately 10 km wide, and is further modified by smaller folds with a wavelength of 1-2 km. Thrust faults with minor offset (1 km or less) further complicate the structures, particularly within the Prophet Formation. One larger thrust fault, the Kluachesi Thrust, carries lower Paleozoic carbonates over Triassic strata and marks the leading edge of the Rocky Mountains on the west edge of the map. Type sections for the Besa River Formation and the Prophet Formation are also found in this map area.