R 11 E 98° R 4 W R 3 W R 2 W R 1 W R 1 E R 2 E R 3 E R 4 E R 5 E R 6 E R 7 E R 8 E R 9 E R 10 E 96° 575 000 600 000 625 000 650 000 675 000 700 000 0 0 0
51° 0 51° 5 SURFICIAL GEOLOGY COMPILATION MAP SERIES 6
5 Birch Broad Valley Morweena Riverton Tp 23 Sandy Lake Otter The Surficial Geology Compilation Map Series (SGCMS) addresses an increasing demand for 0
0 consistent surficial geology information for applications such as groundwater protection, 0 R iver 0 Tp 23 17 5 industrial mineral management, protected lands, basic research, mineral exploration, 6 S Lake 5 an engineering, and environmental assessment. The SGCMS will provide province-wide coverage dy at scales of 1:500 000, 1:250 000 and a final compilation at 1:1 000 000.
I c r e e The unit polygons were digitized from paper maps originally published by the Geological la iv n R Survey of Canada and Manitoba Geological Survey (MGS). In several areas, digital polygons d ic derived from soils mapping were used to fill gaps in the geological mapping. The 1:250 000 Tp 22 Arborg Hnausa 68 scale maps provide a bibliography for the original geological mapping. Poplarfield LAKE 68 Edge-matching of adjoining 1:250 000 scale map sheets is based on data from the Shuttle Tp 22 Radar Topography Mission Digital Elevation Model (SRTM DEM1) as interpreted by the MGS. Oak Other polygon inconsistencies were modified in a similar manner. Geology (colour) is draped 68 68 over a shaded topographic relief map (grey tones) derived from the SRTM DEM. Lake Silver B la 1 ck United States Geological Survey 2002: Shuttle radar topography mission, digital elevation model, Manitoba; United States Geological Survey, URL
Arnes Rembrandt LEGEND Tp 21 Deerhorn Chatfield 0
0 O'Ha Quaternary 0 nly 7 O'Hanly 5 8 2 6
5 R Elk iver ORGANIC DEPOSITS: peat, muck; <1–5 m thick; very low Fish Little Black River O relief wetland deposits; accumulated in fen, bog, swamp, and 0
Island 0
Lake 0 marsh settings 5 2 6
Tp 20 5 6 Meleb SHORELINE SEDIMENTS: sand and gravel; 1–2 m thick; Lm beaches; formed by waves at the margins of modern lakes Tp 20 Lundar Victoria Beach COLLUVIUM: landslide debris, eroded slopes, sheet flood Narcisse C deposits associated with steep slopes
17 59 WINNIPEG EOLIAN: sand and minor silt; dunes, blowouts and undulating Tp 19 Fraserwood E plains; generally overlies deltaic sediments, coarse lacustrine Gimli sediments, or glaciofluvial deposits
11 Tp 19 Fort Alexander Bélair ALLUVIAL SEDIMENTS: sand and gravel, sand, silt, clay, A organic detritus; 1–20 m thick; channel and overbank Siglavik sediments; reworked by existing rivers and deposited primarily Winn as bars Malonton ipeg Pine Falls Powerview MARGINAL GLACIOLACUSTRINE SEDIMENTS: sand and 0
0 Grand Beach Ls
Tp 18 0 gravel; 1–20 m thick; beach ridges, spits, bars, littoral sand and
0
0 gravel; formed by waves at the margin of glacial Lake Agassiz
6 Sandy Hook Grand Marais St-Georges 5
12 Tp 18 0
0 OFFSHORE GLACIOLACUSTRINE SEDIMENTS: clay, silt, minor Silver Falls 0 9 Oak P 0 oint 0 Lc sand; 1–20 m thick; very low relief massive and laminated deposits; 6 Inwood Komarno R 17 5 8 Winnipeg Beach deposited from suspension in offshore, deep water of glacial Lake iv 7 e Agassiz; commonly scoured and homogenized by icebergs North r
Norris White Mud Falls DISTAL GLACIOFLUVIAL SEDIMENTS: fine sand, minor gravel, Tp 17 6 Shoal Gs thin silt and clay interbeds; 1–75 m thick; subaqueous outwash fans; deposited in glacial Lake Agassiz by meltwater turbidity currents; Lake Dunnottar Great Falls Beaconia Lake Tp 17 commonly reshaped by wave erosion and reworked by wind
Stead PROXIMAL GLACIOFLUVIAL SEDIMENTS: sand and gravel; St. Laurent G 1–20 m thick; complex deposits, belts with single or multiple esker
a ridges and kames, as well as thin, low-relief deposits; deposited in
b
o 11 contact with glacial ice by meltwater t
i
n East Teulon a 17
Tp 16 M Scanterbury Thalberg TILL: diamicton; 1–75 m thick; low-relief, commonly streamlined deposits; subglacial
L
e
a
k deposits; largely derived from shale above the Manitoba Escarpment, carbonate rocks Shoal c
a West Netley d u Tp 16 in the central lowlands, and crystalline rocks in areas of Precambrian terrane; L
B
o thicker sequences consist of multiple units of varying texture; commonly scoured by icebergs;
Lake n n covered discontinuously by thin veneers (<1 m) of glaciolacustrine and glaciofluvial sediments
0 e 0 Shoal t 0
5 7 5
Gunton 5 Lake Lake Francis Lake Petersfield
0 Calcareous clay diamicton, predominantly derived from Mesozoic 0
Francis 0 Tm shale 5
Tp 15 Brightstone 7 5
5
7 Libau Calcareous silt diamicton, predominantly derived from Paleozoic St. Ambroise Tp 15 6 8 12 Tc Balmoral Lac du Bonnet dolomite and limestone 9 Clandeboye B
r Non-calcareous sand diamicton, predominantly derived from o k Tp Pre-cambrian crystalline rock e n h e a Woodlands r Oak d Tp 1S4t. Marks e v Hammock i Pre-Quaternary
R Argyle Marsh Ladywood Tp 14 Milner Ridge ROCK: > 75% bedrock outcrop; Cretaceous shales above the R Manitoba Escarpment, Paleozoic carbonate-dominated rocks in 59 areas west and south of Lake Winnipeg, exposed typically as Selkirk glacially striated, low-relief surfaces; in Precambrian terrane, generally East Selkirk unweathered intrusive, metasedimentary, and metavolcanic rocks Warren Stonewall 67 11 having a glacially scoured irregular surface with high local relief 67 9 Tp 13 Seven Sisters Falls 0 0
0 Uncoloured legend blocks indicate units that do not appear on this map. Little Britain 0
5 To aid the reader a shadow effect has been added to exaggerate the topographic relief. 5
5 Tp 13 Stony Mountain Lockport Tyndall River Hills Kirkness
44 0 Published by: Manitoba Industry, Economic Development and Mines Gonor 0 0 Marquette Grosse Isle Seddons Corner 0 Manitoba Geological Survey, 2004 Poplar Point 6 Beausejour 5 44 5
Narol St. Ouens 5 e 8 12 Compiled by: G.L.D. Matile and G.R. Keller in R 26 bo ni d iv si e e Modifed from: River As r Meadows R e 7 Molson Burt, A.K. 2004. Surficial geology, Bélair, Manitoba; Geological Survey of Canada; Manitoba in 26R Tp 12 o iv Industry, Economic Development and Mines, Manitoba Geological Survey, Geoscientific ib Tp 12 e r in s map 2003-2, 1 colour map. Scale 1:100 000. [joint GSC-MGS map] s A Rivercrest 50° 50° 7 11 Burt, A.K. 2004. Surficial geology, Beausejour, Manitoba; Geological Survey of Canada; Manitoba Rosser 8 Cloverleaf 6 101 East St. Paul West Pine Ridge Industry, Economic Development and Mines, Manitoba Geological Survey, Geoscientific map 575 000 600 000 625 000 9 650 000 675 000 700 000 98° 59 96° 2003-5, 1 colour map. Scale 1:100 000. [joint GSC-MGS map] R 4 W R 3 W R 2 W R 1 W R 1 E R 2 E R 3 E R 4 E R 5 E R 6 E R 7 E R 8 E R 9 E R 10 E R 11 E Middlechurch Hazelridge Printed 2004 Scale 1:250 000 Grant, N.M. 2004. Surficial geology, Inwood, Manitoba; Geological Survey of Canada; Manitoba
0 10 20 30 Industry, Economic Development and Mines, Manitoba Geological Survey, Geoscientific map 2003-1, 1 colour map. Scale 1:100 000. [joint GSC-MGS map] Kilometres Grant, N.M. 2004. Surficial geology, Woodlands, Manitoba; Geological Survey of Canada; Manitoba Industry, Economic Development and Mines, Manitoba Geological Survey, A brief description of the Quaternary landscape of southern Manitoba Major landforms: southern Manitoba Major landforms: NTS 62I Geoscientific map 2003-4, 1 colour map. Scale 1:100 000. [joint GSC-MGS map] 100° 98° 96° 98° 96°
G 53° Eastward-facing bedrock escarpments culminating in cuestas which form the Manitoba Escarpment provide a foundation for the 53° e 51° 51° 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 Precambrian Dead-ice SG-62I Above the Manitoba Escarpment, the landscape is dominated by hummocky moraine or dead-ice topography, streamlined topography shield topography and glacial spillways. Many areas are covered by thick sequences of glacial till representing numerous glacial episodes Streamlined landforms Precambrian G dating back more than 100,000 years. The most recent glacial advances were from the northwest. Glacial till tends to be clay rich. l shield ac 52° ia 52° l The Interlake is dominated by streamlined landforms and in lower areas, glaciolacustrine depositional basins. Quaternary sediments flu Surficial geology of the Selkirk map sheet te tend to be relatively thin and the preservation of older sediments is uncommon, limited to bedrock protected areas such as s Dead-ice B L e i escarpments. Bedrock outcrops are common. Glacial advance was generally from the northwest, parallel to the streamlined topography d m (NTS 62I), Manitoba r o i c t k landforms. Glacial till is typically silt rich. Glacial retreat occurred in a series of steps marked by moraines: the Darlingford Moraine o fa f u l c 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 a rb o Red River lobe from the northwest; the Birds Hill–Belair Moraine; the Teulon Moraine; and The Pas Moraine (~9000 years old). n 60° U a p 51° t 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 e 64N 64O 64P 54M r Precambrian Ca G NTS 62I g
A m l l ac shield a e lobe. s p ia c
s b l i
n a f e e i i lu
n l l
l te n 54L 54K
Dead-ice i a 64K 64J 64I 58° i w s d
b r a e topography a r In the Precambrian shield, rock outcrops dominate the landscape. Quaternary sediments are commonly thick, but discontinuous, o o v b o 58° i l e n e im r e M - M i n e c i s rarely completely infilling the bedrock lows. Older sediments, including saprolites, are often preserved in the bedrock lows where n r i u t r s i i 54F o a i L 64F 64G 64H 54E t a p a f r 54G r l a s i i c o l m 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 M e i 54A r t a r n – o p l t n B y o l n h o l i a e 54B u a o – f 54C Te H t l l 64C 64B 64A 54D e s l c 56° As the glaciers retreated, glacial lakes Souris and Hind formed and drained, and glacial Lake Agassiz expanded northward, s g t u i d l 50° e a Portage la Prairie r a T H 50° i c r 56° B i b progressively covering the entire area below the Manitoba Escarpment. Major Lake Agassiz landforms include the Assiniboine a s 53O alluvial fan l o d d 53N Assiniboine Delta e r n 63N 63O 63P 53M b i a 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 B te
and silt. The Herman beaches indicate the highest level attained by Lake Agassiz in southern Manitoba. The Upper Campbell beach Lake Hind Sand dunes clay plain g P l 53K em a 63K 63J 63I 53L b d M H c 54° is the best developed of the Lake Agassiz beaches and is evident along the base of the Manitoba Escarpment. in r o e i a o r r Alluvial fans S Bogs and fens a sp f a m a Glacial flutes 54° i g i n l ll lin n a M d d w r e n o il a a a (clay draped) e Holocene modifications to the landscape include eolian activity (sand dunes) primarily in the Assiniboine Delta and the Sandilands y D b ra n 63F 63G 63H 53E e in d b a e s r Glacial c i Moraine; the Portage la Prairie alluvial fan, from which fluctuating Assiniboine River flow directions over the last 7000 years have Dead-ice h s Lake Souris e Alluvial fans 49° 49° topography s 50° 50° 63C 53D been documented; smaller alluvial fans that have developed along the Manitoba Escarpment; large landslide areas (colluvium) that Portage la Prairie Portage la Prairie 63B 63A 52° 100° 98° 96° alluvial fan 98° alluvial fan G 96° 52° are active along the northern part of the Manitoba Escarpment; and organic accumulations (bogs and fens) with basal radiocarbon la Scale 1:4 000 000 landforms indicating c Scale 1:1 000 000 landforms indicating i 62N 62O 62P 52M dates of approximately 6000 years, that occur in the northeast and extend westward into the northern and eastern Interlake and a direction of ice flow Legend 800 500 200 0 20 40 80 120 160 direction of ice flow l 0 5 10 20 30 40 fl southward into southeastern Manitoba. striations indicating u striations indicating te Kilometres direction of ice flow s Kilometres direction of ice flow Map extent m asl 62K 62J 62I 52L (c 50° la 50° y d 0 90 180 r 62F 62H 52E a 62G p Kilometres e North American Datum 1983 Copies of this map can be obtained from: Phone: (204) 945-4154 d 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 Selkirk map sheet (NTS 62I), 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 4°25' E, decreasing 6.2' annually. Winnipeg, MB, R3G 3P2 free of charge at Surficial Geology Compilation Map Series, SG-62I, scale 1:250 000. Canada www.gov.mb.ca/itm/mrd