| Title | Surficial geology, Ahbau Lake, British Columbia |
| Author | Blais-Stevens, A.; Clague, J.J. |
| Source | Open-File Report - Geological Survey of Canada, No.5273 1 sheet or 1 disc. Publisher: Geological Survey of Canada, Calgary, AB, Canada |
| Publication Date | 2007 |
| Notes | In English. Accessed on Oct. 21, 2008 GeoRef Acc. No: 287618 |
| Index Terms | alluvium; clays; river basins; floodplains; geomorphology; glacial deposits; glacial geology; glacial lakes; glaciation; glacial rivers; gravel; hummocks; glacier flow; lacustrine deposits; lakes; landslides; maps; ocean environments; mass movements (geology); outwash; peat; Pleistocene; Quaternary deposits; sedimentation; sediments; terraces; Canada--British Columbia- -Dunkley; Ahbau Creek; Ahbau Lake; Ahbau Lake map sheet; alluvial fans; bogs; boulders; British Columbia; Canada; Cenozoic; clastic sediments; clay; cobbles; Colebank Lake; colluvium; crags and tails; debris flows; depositional environment; diamicton; drainage basins; drumlins; Dunkley British Columbia; eskers; failures; fens; fluvial environment; fluvial features; fluvial sedimentation; Fraser Glaciation; Genevieve Lake; glacial environment; glacial features; glacial flutings; glacial sedimentation; glaciofluvial environment; glaciolacustrine environment; Hixon Creek; ice movement; ice- marginal features; Interior Plateau; kettles; lacustrine environment; Lodi Lake; marine environment; mass movements; Meadowbank Creek; meltwater channels; mires; Naver Creek; Neck Lake; paleorelief; pebbles; planar bedding structures; postglacial environment; Quaternary; rhythmite; rockfalls; sand; scarps; sedimentary structures; silt; surficial geology; surficial geology maps; Teapot Lake; Terry Creek; till; upper Pleistocene; upper Wisconsinan; Western Canada; Willow River; Wisconsinan; Yardley Lake |
| Abstract | The surficial geology of the Ahbau Lake map area provides a record of the late Quaternary history of central British Columbia near the centre of the former Cordilleran Ice Sheet. The map depicts a variety of sediment units of glacial and non- glacial origin superposed on a hillshade derived from a Digital Elevation Model (DEM). From oldest to youngest, the units are bedrock, till, glaciofluvial deposits, glaciolacustrine deposits, colluvium, alluvium, and organic deposits. Till, the most aerially extensive deposit, was deposited by glacier ice and consists of boulder- to pebble-sized clasts in a matrix of sand, silt, and clay. Till underlies north- trending drumlins that indicate ice flow to the north. Glaciofluvial deposits consist of stratified, well-sorted to poorly-sorted sand and gravel. They are associated with eskers, terraces, and blankets. Some glaciofluvial deposits are kettled. Glaciolacustrine deposits comprise sand, silt, and clay deposited in a former glacial lake impounded by decaying ice masses. Colluvium is derived mainly from glaciolacustrine deposits that failed along river banks. Alluvium consists of fine silt, sand, and minor gravel deposited along modern streams after deglaciation. Organic deposits include peat and organic-rich mud that have accumulated in poorly drained depressions formed in older sediments and bedrock. |
| URL | http://apps1.gdr.nrcan.gc.ca/mirage/mirage_list_e.php?id=223234 |
| Publication Type | map |
| Record ID | 63000315 |