Thrust end moraines northeast of Clearwater, Sask.

Thrust end moraines northeast of Clearwater, Sask.

Thrust end moraines northeast of Clearwater, Sask.

Thrust contact between till to left and kaolinitic sand of Whitemud formation to the right. Clay pit, Dirt Hills, near Claybank. Saturday, October 1, 1960.

Threngslaborgir - Ludentsborgir crater row with Blafjall (left) and Sellanafjall (right)basalt tablemountains in distance. Myvatn area. August 4, 1960. Looking south.

Threngslaborgir - Ludentsborgir crater row with Blafjall (left) and Sellandfjall (right) basalt tablemountains in distance. Myvatn area. Looking south. August 4, 1960.

Three stages in erosion of desert mountains (Gilluly, Waters and Woodford, 1952, p. 358). Top shows alluvial fans at foot of only moderately eroded fault block. Centre shows broad pediment embaying deeply eroded range. Bottom shows residual "inselbergs" on broad graded surface of stream erosion.

Three members of Whitemud Formation (Upper Cretaceous): at base white kaolinitic sand, in middle brown and black carbonaceous shale, on top white kaolinitic clay and sandy clay. Murphy's clay pit on south side of Frenchman River Valley near Eastend, Saskatchewan. May, 1964.

Three members of Whitemud Formation: at base white kaolinitic sand, a middle member of brown and black carbonaceous shale and an upper white clay member. Grassy slope on top of Whitemud is covered Frenchman formation and exposures at top of section show the Paleocene Ravenscrag Formation (Paleocene) with the Ferris coal seam at base. Ravenscrag Butte, Saskatchewan. May 1964.

Third glacial period (Wurm). Old moraine landscapes (1) and outwash plains (3), in front of glacier (2). A. Old moraine deposits and preglacial deposits. B. Meltwater deposits. C. Moraine from the third glacial period. Source: Atlas of Denmark.

Very thinly, "shaly", bedded dolomite as exposed at station WK62. Cambrian Macdougal group. Wednesday, July 15, 1959.

Thingvellir, a graben bounded by straight-lined chasms (gjas) running parallel, approximately NNE-SSW through the lava. They are tension (pulled apart) open fissures. Vertical displacement along some gjas, but not along other. August 8, 1960.

Thermal regime of ground at Skovorodino, Siberia (1928-30). Air temperature are lowest in December and January, but ground at 1.5 and 2 metres just begins to freeze at that time with attendant heaving which attains greatest intensity in February-March when ground is coldest after which temperature rises again. (Muller, 1947, p. 20).

Theoretical concept of a continental shelf, consisting of a wave-cut terrace inside and a wave built terrace outside. Shepard, 1960, p. 96.

Photograph of a watertank at Mohenjo Daro. Shows bituminous layer. Photograph copied from a book.