Spring area issuing from drift. C.N.R. spring near Dittman farm, Alsask, Saskatchewan.

Spring pole drilling.

Stacks, hole in the wall (sea cave), doubly tied island (tombolo), lagoon. Near Vik, August 11, 1960.

Barchans. Stages in development of longitudinal or seif dune from barchan. (a) Barchan dune with uniform wind direction; (b) modification due to swing in wind directions; (c) second barchan tied to its parent; (d) continuation of process to produce second and third barchan linked in long chain or seif. Dapples, 1959, p. 365.

Erosion surfaces. Stages in the development and recession of escarpment. H = hard, resistant formation. S = soft, easily eroded formations. Holmes, 1953, p. 180.

Series of diagrams showing the stages of the development of the Alps. Diagram copied from a book.

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.

Stages of evolution of a karst landscape show increased relief and cavern development followed by decreasing relief and the removal of the limestone mass. Strahler, 1960, p. 461.

Stalactites and stalagmites. Jenolan Cave, Australia. G.S.C. Photo

Stalagcites and stalagmites.

"Standing rock", a large metamorphic erratic, 4 miles west of Hazlet.

Station along line Cusco-Machu Picchu. Snow capped mountains in the distance.

Steam emitting to height of about 150 metres after valve opened in drilled well, Hveragerdi. Drilled well os one foot in diameter, water temperature is 200 degrees Celsius. August 12, 1960.