Calgary

^{Readme
Abstract
Overview
Citation
Metadata
Licence Agreement
Trademarks
Cover Photo
Acknowledgements
SHAPE Metadata
EXPORT Metadata
DXF Metadata}

ABSTRACT
 
A GIS dataset of geological features for the Brown Lake map area (95C/7), Yukon Territory.  

Abstract: The geological map and database are derived from regional

mapping in the Brown Lake (NTS 95C/7) 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 and lithologies.
     The Brown Lake map area is situated to the west of the southern end of the Franklin Mountains in a foothills physiographic setting. The geology of

the area is characterized by sedimentary strata with the predominance of

terrigenous rocks of Late Devonian to Early Cretaceous age. Three subparallel unconformities at the base of Permian, within Permian, and at the base of Triassic successions are recognized. Lower Cretaceous rock units overlie Triassic and Permian rock units with low-angle unconformity at the base. Predominant structures are regional-scale, north-trending box-like folds with narrow limbs and wide hinge zones with sub-horizontal bedding. Locally, the east limb of the Fantasque Syncline is cut by west-verging thrust fault of minor displacement. Stratigraphic improvements include recognition of the informal Permian Tika map unit above the Mattson Formation, assignment of Triassic strata to the Toad Formation, and local recognition of the Chinkeh Formation at the base of Lower Cretaceous succession.