Disconformity between sand above and red clay below in Tertiary red beds. Sungaruyacu River.

Disintegration pattern of ice lobe in southwestern Manitoba near Miniota. Airphoto mosaic.

Dissected pediment south of Big Muddy Valley at Willowbunch. Note bevelling of horizontal strata in outcrop by erosional surface. Sunday, October 2, 1960.

Dissected pediment surface. Looking southwest along main highway to Little Rocky Mountains. October, 1961.

Distorted Saskatchewan gravels overlying Cretaceous shales, upper part of which is oxidized. See Horberg, 1952, section 15.

Distorted Saskatchewan gravels under basal till which is overlain by lower till. See Horberg, 1952, section II, near Lethbridge.

Distribution and thickness of Devonian prairie Evaporites. Black wells are salt free.

Batholiths. Distribution of clearly defined batholiths in North America intruded during the Paleozoic or Mesozoic eras. Many other batholiths od Precambrian age are known in central and eastern Canada in particular, as well as in the mountain areas of the United States, but their boundaries are much more nebulous. The diagram is intended only to supply magnitudes of dimensions and localization in knoen mountain belts. Dapples, 1959, p. 135.

Distribution of coral reef. Areas of the reef are exaggerated because of the scale. Isotherms show the belt that has 70 degrees temperature in summer "extended" and in winter "restricted". Shepard, 1960, p. 216.

Sketch map showing distribution of Mesozoic and Tertiary rocks in the Canadian Arctic archipelago (Raasch et al., 1961, v. 1, p. 383).

Distribution of mountains rising 3000 feet or more above the floor of the Pacific Ocean as islands, reefs, seamounts and guyots. Most of those in the shaded area are guyots. Shepard, 1960, p. 176.

Map showing the distribution of petrologically similar sediments of the Mio-Pliocene age in the Netherlands and adjacent areas. Map copied from a book.

Distribution of sediments in a Minnesota lake (Zumberge, 1952, p.70).

Distribution, thickness, depth of leaching of loess and associated glacial features in the southwestern sector of the Swift Current area (Christiansen, 1957, p. 34).