Badlands, South Dakota, Oligocene.

Grand Canyon, Arizona. September 1947. W.O.K. and Rob Scholten in photograph.

Glory hole, Ruby Gulch Mine, Little Rock Mountains. Dark yellow green rock under trees to the left is Precambrian amphibolite schist. To the right of this is white veined syenite (Tertiary), to right of this is the Ruby shear zone (gold) in the syenite and farther to the right is syenite with pyrite.

Diagrams to suggest the differences in the modes of origin of (A) a peneplain, (B) a panplain, and (C) a pediplain (Thornbury, 1956, p. 182).

Map showing the close correlation between present topography and geologic structure in the Dominguez Hills oil field, California (Thornbury, 1956, p.583)

Buried soil horizon in aeolian sand near Swanson, Sask.

Geological map of Canada.

Partly overgrown talus slope in front of outcrop of Bear Rock limestone at station WK90.

Salt wort ('Salicornia rubra') growing on "alkali" salt flat. Near Cantuar, Saskatchewan Tuesday September 13, 1960.

Lower stratified drift Swift Current Creek section along north side of tributary to Swift Current Creek in Sec. 10, T. 19, R. 13, W. 3 meridian. At this place the Lower stratified drift may possible represent a weathered till (cf. Wickenden 1931 C, Sec. C) as it is not stratified, non-sorted, contains some erratics, is highly calcareous but is not a marl (organic, mainly algal, deposit) as Christiansen (1959) reported. Spade is placed on gradational zone from Wymark Till to Lower Stratified drift. Peter David holds hand on sharp contact between Lower stratified drift and AIkins Till. Tuesday September 13, 1960.

Diagram showing the stages in the development of shoreline emergence of the coastal plain type. N nip, SB sub-marine bar, L lagoon, B barrier island, I inlet, TM tidal marsh. Strahler 1960, p. 422.

Diagram showing schematically the formation of a slump in a valley within the basalt area. 1. Basalt beds; 2. Dikes; 3. Sedimentary layers; 4. Ice; 5. Rockslide (slump). Iceland.

Development of a broad coastal plain. A. Initial stage; plain recently emerged. B. Mature stage; cuestas and lowlands developed. C. Late mature or old age stage; relief very low. Srahler, 1960. p. 450.

A simple alluvial fan. Strahler, 1960, p. 359.