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Chapter 3: Geologic Structure and Landforms

3.57: Drumlinized Ground Moraine South of Holland and Treherne

Nowhere in southern Manitoba are found the classic “inverted spoon” shaped drumlins described in many elementary textbooks. However, immediately south of Holland 1 and Treherne 2 is an area of drumlinized ground moraine. Ridges composed of glacial till have a northwest/southeast alignment 3. The resulting topography has a rolling form—characteristic of drumlin areas—with an amplitude of relief up to 150 feet (46 m)—substantial for southern Manitoba. Lakes are not abundant; the only one large enough to be named on the 1:250,000 map, Pinkerton Lake 4, is south of the main drumlinized area.

The land north of a line joining Holland and Treherne is flat, part of the Assiniboine Delta. Cutting across the northern edge of the drumlinized area is a deep depression 5, up to 100 feet (30.5 m) below the surrounding land. It contains two intermittent lakes 6 and 7 hardly visible on the photo because they were dry at the time. Water from these drains into the Boyne River 8 that bypasses Treherne to the northwest. This lowland is clearly superimposed upon the drumlinized area; it is therefore later in origin, probably originating as the valley of a distributary of the Assiniboine at the time its delta was formed. Near the northern edge a deep gully, Bears Paw Gulch 9, is etched into the deltaic deposits.

On this high-level, small-scale photo, the sections of the DLS system are clearly visible, especially on the flatland of the delta, which is devoted to arable agriculture. Farmsteads with surrounding shelterbelts 10 are clearly visible. A correction line of over 0.25 mile (0.4 km) exists between townships 6 and 7 11. Correction lines, which are located between townships 2 and 3, 6 and 7, 10 and 11, etc., exist to compensate for the convergence of the meridians (on which range line are based), whereas north/south section lines are always one mile apart.[i] The correction line influences the location of PTH 34 12, which runs along a section line in township 6, then jogs westward by the correction distance and the width of an additional section 13 before continuing northward. The main east/west road is PTH 2 14 that bypasses both Treherne and Holland. The CP railway line follows the same route, except that it runs through both villages 15. All the roads in Treherne 2 are parallel or at right angles to the railway, whereas in Holland 1 the older roads are oriented with respect to the railway line; but newer roads in the south follow the lines of the DLS system.

Figure 3.57: Drumlinized Ground Moraine South of Holland and Treherne

Figure 3.57: Drumlinized Ground Moraine South of Holland and Treherne

Figure 3.57

Vertical air photo: A21666-219

Flight height: 23,400 feet a.s.l.; lens focal length: 88.611 mm

Date: July 21, 1970

Scale: 1:75,400 (approx.)

Location: Townships 6 and 7; Ranges 10 and 11 WI

Map sheets: 1:250,000 62G Brandon 

1:50,000 62G/10 Treherne


[i] For details see Richtik, J. M. “The Township and Range Survey System” in Welsted, Everitt, and Stadel, op cit. 1996, 102-103.