Little Grand Rapids 96° R 11 E R 12 E R 13 E R 14 E R 15 E R 16 E 94° 725 000 750 000 775 000 800 000 825 000 52° 52° SURFICIAL GEOLOGY COMPILATION MAP SERIES Moar The Surficial Geology Compilation Map Series (SGCMS) addresses an increasing demand for Lake consistent surficial geology information for applications such as groundwater protection, industrial mineral management, protected lands, basic research, mineral exploration, 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. Tp 34 Tp 34 The unit polygons were digitized from paper maps originally published by the Geological Survey of Canada and Manitoba Geological Survey (MGS). In several areas, digital polygons Family 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. Vickers Edge-matching of adjoining 1:250 000 scale map sheets is based on data from the Shuttle Radar Topography Mission Digital Elevation Model (SRTM DEM1) as interpreted by the MGS. 0 Lake 0 Other polygon inconsistencies were modified in a similar manner. Geology (colour) is draped 0 0 5 over a shaded topographic relief map (grey tones) derived from the SRTM DEM. 7 5 Lake Tp 33 Tp 33 1 D United States Geological Survey 2002: Shuttle radar topography mission, digital elevation model, Manitoba; United o g States Geological Survey, URL <ftp://edcsgs9.cr.usgs.gov/pub/data/srtm/>, portions of files N48W88W.hgt.zip s k through N60W102.hgt.zip, 1.5 Mb (variable), 90 m cell, zipped hgt format [Mar 2003]. in 0 0 0 LEGEND 0 5 7 5 Quaternary ORGANIC DEPOSITS: peat, muck; <1–5 m thick; very low r Tp 32 Rive Tp 32 O relief wetland deposits; accumulated in fen, bog, swamp, and marsh settings Dogskin SHORELINE SEDIMENTS: sand and gravel; 1–2 m thick; Lm beaches; formed by waves at the margins of modern lakes Lake COLLUVIUM: landslide debris, eroded slopes, sheet flood C deposits associated with steep slopes Tp 31 Tp 31 EOLIAN: sand and minor silt; dunes, blowouts and undulating 0 0 0 E plains; generally overlies deltaic sediments, coarse lacustrine 5 2 7 sediments, or glaciofluvial deposits 5 ALLUVIAL SEDIMENTS: sand and gravel, sand, silt, clay, Sasaginnigak A organic detritus; 1–20 m thick; channel and overbank Black sediments; reworked by existing rivers and deposited primarily Tp 30 Lake Tp 30 as bars 0 0 Lake 0 5 2 7 MARGINAL GLACIOLACUSTRINE SEDIMENTS: sand and 5 Ls gravel; 1–20 m thick; beach ridges, spits, bars, littoral sand and gravel; formed by waves at the margin of glacial Lake Agassiz OFFSHORE GLACIOLACUSTRINE SEDIMENTS: clay, silt, minor Lc sand; 1–20 m thick; very low relief massive and laminated deposits; deposited from suspension in offshore, deep water of glacial Lake Tp 29 Tp 29 Agassiz; commonly scoured and homogenized by icebergs DISTAL GLACIOFLUVIAL SEDIMENTS: fine sand, minor gravel, Gs thin silt and clay interbeds; 1–75 m thick; subaqueous outwash fans; B deposited in glacial Lake Agassiz by meltwater turbidity currents; loo River dv commonly reshaped by wave erosion and reworked by wind ein PROXIMAL GLACIOFLUVIAL SEDIMENTS: sand and gravel; 0 0 0 G 1–20 m thick; complex deposits, belts with single or multiple esker 0 0 7 Tp 28 ridges and kames, as well as thin, low-relief deposits; deposited in Tp 28 5 contact with glacial ice by meltwater r North ive TILL: diamicton; 1–75 m thick; low-relief, commonly streamlined deposits; subglacial R Eagle deposits; largely derived from shale above the Manitoba Escarpment, carbonate rocks Lake in the central lowlands, and crystalline rocks in areas of Precambrian terrane; 0 0 0 G thicker sequences consist of multiple units of varying texture; commonly scoured by icebergs; a 0 0 m 7 covered discontinuously by thin veneers (<1 m) of glaciolacustrine and glaciofluvial sediments m South 5 o n Stonehouse Tp 27 Eagle Tp 27 Lake Lake Calcareous clay diamicton, predominantly derived from Mesozoic Tm shale Calcareous silt diamicton, predominantly derived from Paleozoic Tc dolomite and limestone Non-calcareous sand diamicton, predominantly derived from Tp 26 Tp 26 Tp Pre-cambrian crystalline rock English 0 0 Aikens Pre-Quaternary 0 5 L7 ake 6 5 Lake ROCK: > 75% bedrock outcrop; Cretaceous shales above the R Manitoba Escarpment, Paleozoic carbonate-dominated rocks in Riv ver er areas west and south of Lake Winnipeg, exposed typically as Bea Tp 25 Tp 25 glacially striated, low-relief surfaces; in Precambrian terrane, generally Hollow Water unweathered intrusive, metasedimentary, and metavolcanic rocks 0 0 having a glacially scoured irregular surface with high local relief 0 5 7 6 5 Uncoloured legend blocks indicate units that do not appear on this map. To aid the reader a shadow effect has been added to exaggerate the topographic relief. Wanipigow Lake Obukowin Published by: Manitoba Industry, Economic Development and Mines Manitoba Geological Survey, 2004 Tp 24 Lake Tp 24 M Wa Compiled by: G.L.D. Matile and G.R. Keller a nipig nig ow ota ga Riv n Ma er Wallace nigotagan Bissett Modifed from: R RMSID vers. 2.0 2002. Rural Municipality Soil Information Database for Manitoba version 2.0. River iv er Standardized GIS maps and databases of soil information for 117 municipalities in Manitoba Lake 51° 51° and the area of the City of Winnipeg, Land Resource Group - Manitoba; Research Branch, Agriculture and Agri-Food Canada. Publication CD ROM. 725 000 750 000 775 000 800 000 825 000 850 000 96° 94° R 11 E R 12 E R 13 E R 14 E R 15 E R 16 E R 17 E 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 52M 100° 98° 96° 96° 94° G 53° Eastward-facing bedrock escarpments culminating in cuestas which form the Manitoba Escarpment provide a foundation for the 53° e 52° 52° The Pas Moraine or 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 la in n such as faulting, is commonly visible. e d Dead-ice SG-52M 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° 52° Surficial geology of the Carroll Lake map sheet The Interlake is dominated by streamlined landforms and in lower areas, glaciolacustrine depositional basins. Quaternary sediments NTS 52M Precambrian tend to be relatively thin and the preservation of older sediments is uncommon, limited to bedrock protected areas such as shield Dead-ice B e escarpments. Bedrock outcrops are common. Glacial advance was generally from the northwest, parallel to the streamlined topography d (NTS 52M), Manitoba r o c k landforms. Glacial till is typically silt rich. Glacial retreat occurred in a series of steps marked by moraines: the Darlingford Moraine fa u l 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 ts 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 Ca G A m l ac shield lobe. s p ia Ontario s b l e f e i lu n l l te n 54L 54K Dead-ice i 64K 64J 64I 58° i w s b a 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 u t i i 54F s o 64F 64G 64H 54E t a p a f 54G r l i s c l o 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 b o 54A r a r n – o p l t 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.