Seep on homocline where oil beds come to the surface. Diagrammatic figure copied from a book.

Diagram of the formation of various types of kettles. Hutchinson, 1957, fig. 32.

Four kinds of streams associated with eroded dipping sedimentary strata. These form a trellis drainage pattern. Consequent, subsequent, resequent, obsequent streams. Strahler, 1960, p. 451.

U-shaped and related dunes, varieties, diagrammatic. Odynsky, 1958, fig. 2.

Diagram of wedge of the earth showing the major zones and boundaries. Zumberge, 1958, p. 90.

A trellis drainage pattern on folds. This resembles the trellis drainage pattern of eroded dipping sediment (slide Box XII-15), but opposing sets of tributaries are shorted and of more equal length than on cuesta topography. Strahler, 1960, p. 473.

Diagram showing the classification of shorelines. (1) Shorelines of submergence: 1A, submerged mountainous coast; 1B, submerged coastal plain, low relief; 1C, fiord coast; 1D,submerged glacial deposits (drumlins). (2) Shorelines of emergence: 2A, coastal plain type, low relief; 2B, steeply sloping type, strong relief. (3) Neutral shorelines: 3A, alluvial fan shoreline; 3B, delta shoreline; 3C, volcano shoreline; 3D, coral reef shoreline. (4) Fault shoreline. Strahler, 1960, p. 418.

In arid climates, a distinctive set of landforms develops in flat-lying sedimentary formations: plain, mesa, butte, badlands, cliff, plateau, canyon. Strahler, 1960, p. 455.

Diagram showing development of shoreline submergence. Strahler, 1960, p. 419.

A. Coastal blowout dunes with saucer-like depressions. B. Parabolic blowout dunes on an arid plain. C. Parabolic dunes of hairpin form. D. Longitudinal dune ridges on a desert plain. Srahler, 1960. p. 439.

Hogbacks may gradually merge into cuestas, the cuesta into plateaus and esplanades, if the dip of the strata becomes less from one place to another. Subsequent stream, hogback ridge, cuesta, mesa, esplanade, cliff, plateau. Strahler, 1960, p. 463.

Slump rocks rotate backwards as they slide from a cliff. Strahler, 1960, p. 323.

Land masses can be classified according to the groups illustrated here: Coastal plains, horizontal strata, folds, domes, fault blocks, homogenous crystalline masses, complex structures,volcanoes. Srahler, 1960. p. 449.

Metamorphic rocks tend to form elongate parallel belts in valleys and mountains. Strahler, 1960, p. 284.

A sequence of events which have generally been repeated throughout geologic time over the continents of the globe is well illustrated in the Hudson Valley. In the diagrams, northwest is to the left, southeast to the right. A. In a shallow inland seaway thousands of feet of sediment accumulated during the Palaeozoic era. B. Mountain building at the end of the Palaeozoic era produced a series of folds and thrust faults. A general uplifting brought a large mass above sea level. C. Followings long period of erosion, a peneplain was produced. Then faulting in the Triassic produced gently tilted blocks. D. Second long period of erosion resulting in another peneplain. E. The region today owes its relief to different rates of removal of the various kinds of rocks. Strahler, 1960, p. 296.