Rim of main explosion crater Ludent showing blocks which prevail here. The fragments are broken, not twisted, solid blocks of rocks thrown out when explosion occurred. August 4, 1960.

Rills cut into wall of Cypress Hills gravels, located between ridges of gravel due to bulldozing. View of the bull-dozed ridges on top. Stu Jordan in picture.

Rills cut into wall of Cypress Hills gravels, located between ridges of gravel due to bulldozing on top.

Rills cut into wall of Cypress Hills gravels, located between ridges of gravel due to bulldozing on top. Notice resemblance to jointing. Two persons on top.

Rills cut into wall of Cypress Hills gravels, located between ridges of gravel due to bulldozing. View of the bull-dozed ridges on top. Stu Jordan in picture.

Rill erosion in Hill. Highway 83 near Shellmouth, Manitoba. October 5, 1962.

Rift valley. Experimental fault trough (graben). Mass of clay, slowly pulled apart, produces a web shaped fault trough (graben). Lateral extension (pull) due to uplift - thus subsiding graben may indicate uplift of the shield or continent (Rhine Valley, Red Sea). Cloos, 1954, p1. 44.

Rierdon formation, shales of Jurassic age to show outcrop of dipping beds. Southside of Zortman Butte, Little Rocky Mountains, Montana, May, 1964.

Rhythmic sediments (Varves?) in coarse-grained glacial lake deposits. Pleistocene. Near Drumheller, Alberta. May, 1961.

Reykir pumping station for hot water supply. Operation started in 1943. Produces in 112 wells 350 litres per second at 86 degrees C. to supply 60% homes in Reykjavik, thus saving 65,000 tons of coal/year. August 1, 1960.

Retreating margin of Barnes Ice Cap showing ablation moraine and end moraine (Goldthwaite, 1951, Jour. of Geol., p. 570.)

Restoration of a Pleistocene mastodon (above) and a Pleistocene Woolly mammoth (below). A tooth of each is shown with a hand for scale. The crowned tooth of the mastodon was suitable for diet of twigs, branches and cones, whereas the infolded structure of the mammoth tooth was more adapted to a grass diet (Zumberge 1958, p. 362).

Residual local anomaly, interpreted buried valley, cross section, and corresponding theoretical anomaly, central portion of traverse 1, T. 27, R. 23 W. 3. Low point of anomaly corresponds to trend on slide 124. (Hall and Hajnal, 1962)

Residual (A) and transported (B) mantles. (A) The mantle was derived from the underlying granite, and is therefore residual, (B) The mantle was deposited on the granite bedrock and is therefore transported. Zumberge, 1958, p.97.

Repairing earthquake damage on main square, Arequipa. Noted toppled ornament on the top of building.