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University of Saskatchewan, University Archives & Special Collections Kupsch, Walter Oscar
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Stages in the life history of a stream

Stages in the life history of a stream. A. In the initial stage a stream has lakes, waterfalls and rapids. B. By middle youth the lakes are gone, but falls and rapids persist along the narrow incised gorge. C. Early maturity brings a smoothly graded profile without rapids or falls, but with the beginning of a floodplain. D. Approaching full maturity, the stream has a flood plain alomost wide enough to accommodate its meanders. E. Full maturitymis marked by a broad flood plain and freely developed meanders: levee, oxbow lake, yazoo stream, alluvium, bluffs, flood plain. Strahler, 1960. p. 350.

Castroides

Castroides. Skull of the giant Pleistocene beaver (top) compared with the skull of the living form. The history of the beaver is typical of the history of many mammals in that the living forms are smaller than their leistocene predecessors. In general, the larger members of any fauna disappear in times of stress. Stokes, 1960, p. 444.

Hawaii and seamounts

Hawaii and seamounts. Topographical profile across Hawaiian Islands. Profiles showing postulated history of seamounts int he Gulf of Alaska. Jacobs et al., 1959, p. 272.

Post-Pleistocene fossil tree trunk

Post-Pleistocene fossil tree trunk, about 10,000 years old. Locality: lsd. 11, sec. 23, T. 15, R. 29, W. 2, 1 1/2 miles NW of Lillestrom, Saskatchewan. Photo taken in front of the Museum of Natural History, Regina.