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TitleGeology, Toad River (southeast), British Columbia
AuthorMcMechan, M E
SourceGeological Survey of Canada, Canadian Geoscience Map 149, 2014, 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 formatreadme
File formatpdf
ProvinceBritish Columbia
NTS94N/01; 94N/02; 94N/07; 94N/08
AreaToad River; Liard River; Irene Lake
Lat/Long WENS-125.0000 -124.0000 59.5000 59.0000
Subjectsstructural geology; stratigraphy; bedrock geology; wells; faults; folds; tills; sedimentary rocks; sandstones; mudstones; shales; siltstones; conglomerates; lithology; unconformities; gas; hydrocarbons; Liard Basin; Kotaneelee Formation; Dunvegan Formation; Fort St. John Group; Sully Formation; Sikanni Formation; Lepine Formation; Buckinghorse Formation; Scatter Formation; Garbutt Formation; Liard Formation; Toad Formation; Grayling Formation; Kindle Formation; Fantasque Formation; Quaternary; Cretaceous; Triassic; Permian; Mississippian; Pennsylvanian
Illustrationslocation maps
ProgramYukon Sedimentary Basins, GEM: Geo-mapping for Energy and Minerals
Released2014 05 16
AbstractThe Toad River southeast map area (NTS 94-N/SE) in western Liard Basin is underlain by a thick Triassic to Cretaceous clastic rock-dominated succession. A prominent escarpment held up by resistant Upper Cretaceous sandstone and conglomerate of the Sikanni and Dunvegan formations marks the west limb of the Liard syncline. To the east, exposure is limited to more incised drainages, mainly of the Dunvegan Formation. A few discontinuous gentle folds occur. To the west the amount of deformation decreases noticeably northward. In the southwest, the Foothills are characterized by a well developed terrain of northwest-trending, open folds beautifully outlined by resistant Triassic sandstone of the Liard Formation. North of Liard River only a few gentle north or northwest-trending folds deform Triassic and Lower Cretaceous strata in the transition zone to the southern Liard Fold and Thrust Belt. Drilling has shown the prominent Toad River Anticlinorium overlies uplifted Proterozoic and Paleozoic strata.
Summary(Plain Language Summary, not published)
This is the first 1:100 000 scale geological map of the southeast Toad River quadrant, northeast British Columbia. It shows the surface distribution and structure of the exposed 335 to 90 million year old strata. In the west numerous folds occur. In the east only a few widely spaced, broad, gentle folds occur. The map incorporates new data collected by the GEM project as well as old observations. The northeast part of the sheet is only 12 km west of the major shale gas discovery well announced by Apache in 2012. The eastern part of the area should be highly prospective for shale gas hosted by similar 385 -350 million year old organic rich shales. 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.