Uncontrolled disintegration moraine with "doughnuts" emphasized by aspen ring "bluffs". East of Saskatoon, flight to Winnipeg.

Unconformity between marine gravels wit Mytilus (a pelecypod) over ice contact stratified drift. Boseville pit near Ottawa.

Unconformable contact between lower, sandy member of Whitemud Formation below and Frenchman sands above. Note clay pebbles forming a basal conglomerate in the Fenchmen sands. No quartzite pebbles were found in place as mentioned by Kupsch, 1956, p. 20-21. May, 1964.

Unconformable contact between upper white member of Whitemud Formation below and purplish clays of Frenchman Formation (Battle facies) above. Ravenscrag Butte, Saskatchewan. May 1964.

Unconformable contact between permo-pennsylvanian Rocky Mountain quartzite at left and Triassic Spray River formation, dark phosphatic shale at right. Lake Minnewanka near Banff, Alberta

Typical profiles of the continental shelf. The vertical scale is greatly exaggerated. This serves to show the variation between a smooth graded slope (Sec. A) and the highly irregular shelf off a glaciated area (Sec. G), 1960, p. 71.

Typical members of the Permian Eurydesma fauna (Agar 1963, p. 290).

Type section of Exshaw shales on Jura Creek near Exshaw, Alberta. Overlying the black shales is the Banff to the left, underlying the shales to the right is the Palliser. May, 1961.

Type section of Eastend formation (correlative of Fox Hills in U.S.). Near Gould's Quarry, Eastend, Sask.

Type section of Eastend formation (correlative of Fox Hills in U.S.). Near Gould's Quarry, Eastend, Saskatchewan.

Two types of slide shown schematically. At top three blocks of earth have rotated in clay-water slurry. In the other slide total liquefaction has occurred and water forced out of the clay has formed a pond. The vertical dimension is exaggerated five times. Typical slide has a figure-eight appearance. Material the leaves a hollow at the head region piles up at the foot. The low cliff at the neck is often the bank of a river (Kerr, P.F., 1963, Sci. Amer. Nov., p. 138).

Two samples of quick clay showing startling contrast. Column of undisturbed clay (left) holds 11 kilograms (24 pounds). It can support 2,100 pounds per square foot surface. Another piece of the same clay pours like a liquid afer being stirred in a beaker. No water was added. Demonstration was made by Carl B. Crawford of the National Research Council of Canada (Kerr, P.F., 1963, Sci. Amer. Nov., p. 134).

Turbidity currents. Sketch map of 1929 Grand Banks turbidity current. Jacobs et al., 1959, p. 240.

Turbidity currents. Topographical profile along the path of the 1929 Grand Banks, turbidity current showing cable breaks, cores and velocities of the current. Jacobs et al., 1959, p. 241.

Tunnel-meltwater glacial complex. 1. Moraine plateau. 2. Tunnel valley. a. Mosso basin. b. Saltena valley. 3. Fluvio-glacial valley. 4. Valley terraces, resistant parts of earlier valley bottoms, consisting of metlwater deposits. 5. Dead-ice depressions. c. Salten Langso. d. Bog depression. e. Kettle-holes. 6. Post-glacial erosion valleys, dissecting the moraine plateau. 7. Recent valley bottom. f. Gudena. g. Delta of the River Gudena in the Mosso basin. Source: Atlas of Denmark.