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TitleSurfical geology of the Cypress Lake and Wood Mountian map areas, southwestern Saskatchewan
AuthorKlassen, R W
SourceGeological Survey of Canada, Bulletin 562, 2002, 60 pages (2 sheets), (Open Access)
PublisherNatural Resources Canada
MapsPublication contains 2 maps
Map Info.surficial geology, surficial features and drift thickness, 1:250,000
Mediapaper; on-line; digital
RelatedThis publication contains the following publications
File formatpdf
NTS72F; 72G
AreaCypress Lake; Wood Mountain
Lat/Long WENS-110.0000 -106.0000 50.0000 49.0000
Subjectssurficial geology/geomorphology; physiography; bedrock geology; drift deposits; glacial features; landforms; glacial landforms; moraines; sediment distribution; proglacial deposits; glacial deposits; glaciofluvial deposits; glaciolacustrine deposits; postglacial deposits; Pleistocene; Holocene; Wisconsinian glacial stage; glacial stages; Quaternary; Cretaceous; Tertiary; Mesozoic; Cenozoic
Illustrationssketch maps; tables; graphs; stratigraphic sections; diagrams
Released2002 01 01; 2015 04 30; 2016 01 12
AbstractSix landscape complexes were identified in the Cypress Lake and Wood Mountain map areas on the basis of similarities in their geomorphology and geology. Bedrock terrain with drift is the oldest complex identified and consists of unglaciated terrain formed mainly by fluvial and mass-wasting processes during the Late Tertiary. Successively younger glaciated landscapes are designated as bedrock terrain with residual drift, bedrock terrain with drift, first-advance drift, interlobate drift, and last-advance drift.

A north to south forest-grassland transition was established across the regional drainage divide about 14 ka. Prairie grassland vegetation covered the southern slopes of the uplands and a belt of forest-grassland transition had shifted well to the north of the map area at the beginning of the Holocene.

Three major changes in climate are indicated by the unglaciated landscapes of the Cypress Hills and Wood Mountain uplands, and the landscapes of the surrounding glaciated plains. The upland landscapes formed under arid to
semi-arid Late Tertiary climates and contrast sharply with the glaciated landscapes shaped by the Late Wisconsinan Laurentide ice sheet. Climatic warming resulted in deglaciation, followed by a wet interval between 14 and 7 ka, a dry interval between 7 and 5 ka, and a return to somewhat wetter conditions from about 4 ka to the present.