Geology, Toad River (northeast), British Columbia / [by] M.E. McMechan. : M183-1/150-2013E-PDF
"The 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"--Abstract.
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| Ministère/Organisme | Canada. Natural Resources Canada. Geological Survey of Canada. |
|---|---|
| Titre | Geology, Toad River (northeast), British Columbia / [by] M.E. McMechan. |
| Titre de la série | Canadian geoscience map ; 150 |
| Type de publication | Série - Voir l'enregistrement principal |
| Langue | [Anglais] |
| Format | Électronique |
| Document électronique | |
| Note(s) | Includes bibliographical references. Includes abstract in French. |
| Information sur la publication | Ottawa : Natural Resources Canada, c2013. |
| Auteur / Contributeur | McMechan, Margaret E. (Margaret Evaline), 1953- |
| Description | 1 map : col. |
| ISBN | 978-1-100-22368-1 |
| Numéro de catalogue |
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| Numéro de catalogue du ministère | 293264 |
| Édition | Preliminary version |
| Données cartographiques | Scale 1:100,000 |
| Descripteurs | Geological maps Rivers Surficial geology |
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