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TitleGeology, Toad River (northeast), British Columbia
AuthorMcMechan, M E
SourceGeological Survey of Canada, Canadian Geoscience Map 150, 2013, 1 sheet,
PublisherNatural Resources Canada
Maps1 map
Map Info.geological, bedrock, structural geology, 1:100,000
ProjectionUniversal Transverse Mercator Projection, zone 10 (NAD83)
Mediadigital; on-line
File formatpdf
ProvinceBritish Columbia
NTS94N/09; 94N/10; 94N/15; 94N/16
AreaToad River
Lat/Long WENS-125.0000 -124.0000 60.0000 59.5000
Subjectsstructural geology; stratigraphy; bedrock geology; wells; faults; folds; tills; sedimentary rocks; sandstones; mudstones; shales; siltstones; conglomerates; lithology; unconformities; gas; hydrocarbons; Liard Basin; Beaver River Anticline; Quaternary; Cretaceous; Triassic; Permian; Mississippian; Pennsylvanian; Carboniferous
Illustrationslocation maps
ProgramYukon Sedimentary Basins, GEM: Geo-mapping for Energy and Minerals
Released2013 12 17
AbstractThe Toad River northeast area (NTS 94-N/NE) in western Liard Basin is underlain by a thick Mississippian to Cretaceous clastic-dominated succession deformed into a few north- or northeast-trending folds. Local abrupt changes in the thickness of Permian sandstone-carbonate and chert units indicate episodes of older block faulting. A major unconformity at the base of the Cretaceous has removed much of the Triassic succession preserved to the southwest. A prominent escarpment capped by Upper Cretaceous Dunvegan conglomerate marks the west limb of the Liard syncline. To the east, poorly exposed Upper Cretaceous conglomerate, shale, and sandstone outline gentle folds. In the Liard Fold and Thrust Belt to the west, four prominent, south-plunging anticlines occur near 60°N. West-directed backthrusts, that follow the locus of older structures and die out southward, offset their steeper west limb at Paleozoic levels. Significant natural gas reserves occur in middle Devonian carbonate beneath the Beaver River Anticline.
Summary(Plain Language Summary, not published)
This is the first 1:100 000 scale geological map of the northeast Toad River quadrant, northeast British Columbia. It shows the surface distribution and structure of the exposed 335 to 70 million year old strata. Broad folds dominate the structure. Mapping has shown reactivated old faults occur along many of these. The southeast part of the sheet is only 15 km northwest of the major shale gas discovery well announced by Apache in 2012 and the eastern part of the area should be highly prospective for shale gas hosted by similar 385 -350 million year old organic rich strata. The map and associated studies should be of interest to the petroleum industry when the price of natural gas rises and exploration moves westward in the Liard Basin area.