Island 102° R 29 W R 28 W R 27 W R 26 W R 25 W R 24 W R 23 W R 22 W R 21 W R 20 W R 19 W R 18 W 100° 300,000 325,000 350,000 375,000 400,000 Channel 425,000 Island 53° 53° 0 SURFICIAL GEOLOGY COMPILATION MAP SERIES 0 0 ,
5 Re 7 d Cameron
8 The Surficial Geology Compilation Map Series (SGCMS) addresses an increasing demand for , 5 De Dawson Bay consistent surficial geology information for applications such as groundwater protection, Tp 46 er R Tp 46 ive 10 r Bay LAKE industrial mineral management, protected lands, basic research, mineral exploration, Red Deer engineering, and environmental assessment. The SGCMS will provide province-wide coverage at scales of 1:500 000, 1:250 000 and a final compilation at 1:1 000 000. Dawson The unit polygons were digitized from paper maps originally published by the Geological Lake Survey of Canada and Manitoba Geological Survey (MGS). In several areas, digital polygons derived from soils mapping were used to fill gaps in the geological mapping. The 1:250 000 scale maps provide a bibliography for the original geological mapping. Red Deer Lake WINNIPEGOSIS Edge-matching of adjoining 1:250 000 scale map sheets is based on data from the Shuttle Tp 45 1 Tp 45 Radar Topography Mission Digital Elevation Model (SRTM DEM ) as interpreted by the MGS. Other polygon inconsistencies were modified in a similar manner. Geology (colour) is draped over a shaded topographic relief map (grey tones) derived from the SRTM DEM. Grand
Bay 1 Island United States Geological Survey 2002: Shuttle radar topography mission, digital elevation model, Manitoba; United Westgate States Geological Survey, URL
77 0
t 0
n 0 i , Tp 44
o 0 LEGEND P 5 8 Tp 44 , t 5 al Baden S Quaternary 0 0 0 ,
0 ORGANIC DEPOSITS: peat, muck; <1–5 m thick; very low 5 Pelican 8 ,
5 r O relief wetland deposits; accumulated in fen, bog, swamp, and ve Ri Shoal River marsh settings Bay Pelican Rapids LAKE SHORELINE SEDIMENTS: sand and gravel; 1–2 m thick; ck Lm ro beaches; formed by waves at the margins of modern lakes ep te Tp 43 Tp 43 S COLLUVIUM: landslide debris, eroded slopes, sheet flood Mafeking C deposits associated with steep slopes
EOLIAN: sand and minor silt; dunes, blowouts and undulating E plains; generally overlies deltaic sediments, coarse lacustrine WINNIPEGOSIS sediments, or glaciofluvial deposits r e Tp 42 iv Tp 42 10 R North ALLUVIAL SEDIMENTS: sand and gravel, sand, silt, clay, Steeprock Kircro A organic detritus; 1–20 m thick; channel and overbank Lake Bellsite L sediments; reworked by existing rivers and deposited primarily ll as bars
e 0
B 0 0 , 5 2 8
, MARGINAL GLACIOLACUSTRINE SEDIMENTS: sand and
South 5 Armit Steeprock Ls gravel; 1–20 m thick; beach ridges, spits, bars, littoral sand and Lake
0 gravel; formed by waves at the margin of glacial Lake Agassiz 0 0 ,
5 Lake Bell Tp 41 2 Tp 41 8 , 5 OFFSHORE GLACIOLACUSTRINE SEDIMENTS: clay, silt, minor Swan Lc Lake Indian Birch sand; 1–20 m thick; very low relief massive and laminated deposits; deposited from suspension in offshore, deep water of glacial Lake Agassiz; commonly scoured and homogenized by icebergs 10 Pelican DISTAL GLACIOFLUVIAL SEDIMENTS: fine sand, minor gravel, Gs thin silt and clay interbeds; 1–75 m thick; subaqueous outwash fans; Birch deposited in glacial Lake Agassiz by meltwater turbidity currents; Tp 40 Tp 40 commonly reshaped by wave erosion and reworked by wind
Lake Lake PROXIMAL GLACIOFLUVIAL SEDIMENTS: sand and gravel; G 1–20 m thick; complex deposits, belts with single or multiple esker ridges and kames, as well as thin, low-relief deposits; deposited in contact with glacial ice by meltwater Birch River Island
r TILL: diamicton; 1–75 m thick; low-relief, commonly streamlined deposits; subglacial e iv deposits; largely derived from shale above the Manitoba Escarpment, carbonate rocks R Tp 39
Tp 39 0 in the central lowlands, and crystalline rocks in areas of Precambrian terrane; 0 0 ,
0 thicker sequences consist of multiple units of varying texture; commonly scoured by icebergs;
Whitefish 0 8 ,
5 covered discontinuously by thin veneers (<1 m) of glaciolacustrine and glaciofluvial sediments
0 Lake
0 Lenswood 0 ,
0 r 0 e
8 v , i 5 R Calcareous clay diamicton, predominantly derived from Mesozoic Tm shale
Tp 38 Tp 38 Calcareous silt diamicton, predominantly derived from Paleozoic Tc n dolomite and limestone a lic 10 e r P LAKE e v Bowsman i Non-calcareous sand diamicton, predominantly derived from R Tp Pre-cambrian crystalline rock
Pre-Quaternary Tp 37 Tp 37 y od Duck Bay Wo ROCK: > 75% bedrock outcrop; Cretaceous shales above the R Manitoba Escarpment, Paleozoic carbonate-dominated rocks in areas west and south of Lake Winnipeg, exposed typically as glacially striated, low-relief surfaces; in Precambrian terrane, generally k e r e unweathered intrusive, metasedimentary, and metavolcanic rocks r e
v 0 C i 0 having a glacially scoured irregular surface with high local relief
R 0 , 5 7 7 , ch 5 e Swan River Uncoloured legend blocks indicate units that do not appear on this map. be WINNIPEGOSIS Tp 36 Tp 36 te 0 hi Renwer 10 To aid the reader a shadow effect has been added to exaggerate the topographic relief. 0 10 0 , W g 5 n rin 7 a oa Minitonas 7 R , w 5 S Briggs Spur Published by: Manitoba Industry, Economic Development and Mines Manitoba Geological Survey, 2004 Compiled by: G.L.D. Matile and G.R. Keller 83 Cowan Modifed from: Tp 35 Tp 35 Clarke, M.D. 1989. Surficial geology, Swan Lake, Manitoba-Saskatchewan; Geological Survey of Canada, "A" Series Map, Map 1697A, Scale 1:250 000. 20 Pine Creek 52° Kenville 52° Camperville Red 300,000 325,000 83 350,000 375,000 400,000 425,000 102° 100° R 29 W R 28 W R 27 W R 26 W R 25 W R 24 W R 23 W R 22 W R 21 W R 20 W R 19 W Printed 2004 Scale 1:250 000
0 10 20 30
Kilometres
A brief description of the Quaternary landscape of southern Manitoba Major landforms: southern Manitoba Major landforms: NTS 63C 100° 98° 96° 102° 100°
Eastward-facing bedrock escarpments culminating in cuestas which form the Manitoba Escarpment provide a foundation for the G 53° 53° 53° 53° eo NTS 63C The Pas Moraine r M ge present-day landscape of southern Manitoba. To the east, the landscape is dominated by Precambrian rocks and bedrock structure, o Is SURFICIAL GEOLOGY COMPILATION MAP SERIES ra l i an such as faulting, is commonly visible. ne d Dead-ice SG-63C Above the Manitoba Escarpment, the landscape is dominated by hummocky moraine or dead-ice topography, streamlined topography topography and glacial spillways. Many areas are covered by thick sequences of glacial till representing numerous glacial episodes Streamlined landforms Precambrian dating back more than 100,000 years. The most recent glacial advances were from the northwest. Glacial till tends to be clay rich. shield 52° The Interlake is dominated by streamlined landforms and in lower areas, glaciolacustrine depositional basins. Quaternary sediments 52° Surficial geology of the Swan Lake map sheet tend to be relatively thin and the preservation of older sediments is uncommon, limited to bedrock protected areas such as Dead-ice B e escarpments. Bedrock outcrops are common. Glacial advance was generally from the northwest, parallel to the streamlined topography d (NTS 63C), Manitoba r o c landforms. Glacial till is typically silt rich. Glacial retreat occurred in a series of steps marked by moraines: the Darlingford Moraine k f a u Dead-ice 100° 96° 92° 88° (~11,000 years old); the Sandilands Moraine, which represents the interlobate position of the Rainy lobe from the northeast and the lt s topography Red River lobe from the northwest; the Birds Hill–Belair Moraine; the Teulon Moraine; and The Pas Moraine (~9000 years old). 60° U p 51° Index Map George Island Moraine, contemporaneous with and to the east of The Pas Moraine, is another ice margin of the retreating Rainy 51° pe 64N 64O 64P 54M r Precambrian Streamlined Ca G Saskatchewan
A m l ac shield lobe. s p ia Landforms s b l f
e e i lu
n l
l te n 54L 54K
Dead-ice i 64K 64J 64I 58° i w s
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topography a r In the Precambrian shield, rock outcrops dominate the landscape. Quaternary sediments are commonly thick, but discontinuous, o v
o i l 58° n e im e - M e c i rarely completely infilling the bedrock lows. Older sediments, including saprolites, are often preserved in the bedrock lows where n r t u i i 54F s o 64F 64G 64H 54E t a p a f 54G r l i s o c l e a they are protected from glacial erosion. Glacial advance was generally from the northeast. Glacial till is typically sand rich. l c N w r a M B o 54A b r a r n – o t p l y o l n h l i a e 54B Teu t a 54D 54C H e s 64C 64B 64A 56° As the glaciers retreated, glacial lakes Souris and Hind formed and drained, and glacial Lake Agassiz expanded northward, s g t d la 50° 50° Portage la Prairie ir c 56° B ia 53O progressively covering the entire area below the Manitoba Escarpment. Major Lake Agassiz landforms include the Assiniboine alluvial fan l d 53N e 63O 53M Assiniboine Delta b 63N 63P Delta, which formed as glacial meltwater flowed from the Assiniboine spillway, and clay plains composed of tens of metres of clay ri Glacial Glacial Lake Agassiz s and silt. The Herman beaches indicate the highest level attained by Lake Agassiz in southern Manitoba. The Upper Campbell beach Lake Hind Sand dunes P clay plain 53K em 63K 63J 63I 53L b d M H 54° is the best developed of the Lake Agassiz beaches and is evident along the base of the Manitoba Escarpment. in r o e a o r r Alluvial fans S Bogs and fens sp f a m a 54° i g i n l n n a d lw li M h r e n o il ac a a a e Holocene modifications to the landscape include eolian activity (sand dunes) primarily in the Assiniboine Delta and the Sandilands y D b ra n ll b 63F 63G 63H 53E e in d mpbe a e s r Ca Glacial c Uppe Moraine; the Portage la Prairie alluvial fan, from which fluctuating Assiniboine River flow directions over the last 7000 years have Dead-ice h Lake Souris e Alluvial fans 49° 49° topography s 52° 52° 63C 53D been documented; smaller alluvial fans that have developed along the Manitoba Escarpment; large landslide areas (colluvium) that 63B 63A 52° are active along the northern part of the Manitoba Escarpment; and organic accumulations (bogs and fens) with basal radiocarbon 100° 98° 96° 102° 100° 52° Scale 1:4 000 000 landforms indicating Scale 1:1 000 000 landforms indicating 62N 62O 62P 52M dates of approximately 6000 years, that occur in the northeast and extend westward into the northern and eastern Interlake and 800 500 200 0 20 40 80 120 160 direction of ice flow 0 5 10 20 30 40 direction of ice flow Legend southward into southeastern Manitoba. striations indicating Kilometres Kilometres m asl direction of ice flow 62K 62I 52L Map extent 62J 50° 50° 0 100 200 62F 62G 62H 52E Kilometres North American Datum 1983 Copies of this map can be obtained from: Phone: (204) 945-4154 Suggested reference: Universal Transverse Mercator Projection, Zone 14 Manitoba Industry, Economic Development and Mines Toll free: 1-800-223-5215 Matile, G.L.D. and Keller, G.R. 2004: Surficial geology of the Swan Lake map sheet (NTS 63C), Manitoba; Shuttle Radar Topography Mission elevation data provided by NASA (2003) Manitoba Geological Survey, Publication Sales E-mail: [email protected] 100° 96° 92° 100X Vertical Exaggeration 360-1395 Ellice Ave This map is available to download Manitoba Industry, Economic Development and Mines, Manitoba Geological Survey, Approximate mean declination (2004) for centre of map is 8°21' E, decreasing 8.1' annually. Winnipeg, MB, R3G 3P2 free of charge at Surficial Geology Compilation Map Series, SG-63C, scale 1:250 000. Canada www.gov.mb.ca/itm/mrd