| Title | Quaternary geology of the Frances Lake map area, Yukon and Northwest Territories |
| Download | Downloads |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Dyke, A S |
| Source | Geological Survey of Canada, Memoir 426, 1990, 39 pages (5 sheets), https://doi.org/10.4095/131317 (Open Access) |
| Year | 1990 |
| Document | serial |
| Lang. | English |
| Maps | Publication contains 5 maps |
| Map Info. | surficial geology, landforms, 1:100,000 |
| Map Info. | geological, paleogeography, 1:250,000 |
| Media | paper; on-line; digital |
| Related | This publication contains the following
publications |
| File format | pdf |
| Province | Yukon; Northwest Territories |
| NTS | 105H |
| Area | Frances Lake; Dolly Varden Creek; Frances River; Yusezyu River; Little Hyland River |
| Lat/Long WENS | -130.0000 -128.0000 62.0000 61.0000 |
| Subjects | surficial geology/geomorphology; geochemistry; glacial history; glaciers; glaciation; deglaciation; erosion; ice movement; ice movement directions; wisconsinian glacial stage; glacial stages; tills;
alluvial deposits; glaciofluvial deposits; rock glaciers; landforms; glacial deposits; lithofacies; facies; moraines; trace element analyses; analyses; geochemical analyses; till geochemistry; glaciolacustrine deposits; colluvial deposits;
landslides; Anvil Allochthon; Selwyn Fold Belt, Mack; Mcconnell Glacial Stage; Quaternary |
| Illustrations | sketch maps; rose diagrams; photographs; charts; histograms; analyses |
| Released | 1991 01 01; 2014 07 24 |
| Abstract | The Quaternary geology of the Frances Lake map area described herein is based on the first detailed mapping (1:100 000 scale) in the area. This part of the northeastern Cordillera was eroded by alpine
cirque glaciers throughout much of the Quaternary. However, almost all surficial deposits and smaller landforms result from complete glaciation by ice flowing southward from the Logan Mountains during the Late Wisconsinan and from postglacial,
alpine, slope processes. Till, the dominant surficial material, is subdivided into several lithic facies that differ widely in clast lithology and more subtly in grain size and geochemical composition. Glaciofluvial and alluvial deposits are thick
and nearly continuous along most valleys and thick glaciolacustrine deposits occur in two eastern valleys. Alpine slope processes have produced extensive talus aprons and many rock glaciers derived from them as well as some rock and numerous snow
avalanches. Widespread rock glacier development occurred about 4500 years ago with resurgences at several times since. Several glacial advances occurred during the last 400 years. Late Wisconsinan deglaciation was marked by large, lowland ice lobes
that retreated northward accompanied by segregation from alpine glaciers. Both types of glaciers left an abundant geomorphological record but deglaciation remains undated. |
| GEOSCAN ID | 131317 |
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