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A coastal plain after elevation and renewed dissection. Two cuestas and two lowlands are now produced from the hard and weak strata, respectively.

Coastal Plain After Elevation

A coastal plain after elevation and renewed dissection. Two cuestas and two lowlands are now produced…

Block diagram illustrating the formation of three cuestas and lowlands by normal drainage on the peneplaned strata which surround the old Ontario dome on the south and west.

Cuestas and Lowlands

Block diagram illustrating the formation of three cuestas and lowlands by normal drainage on the peneplaned…

A coastal plain in the first cycle of erosion. The presence of two hard layers produces a terraced cuesta front. In exceptional cases the upper terrace may weather back with sufficient rapidity to constitute a second cuesta with a lowland of some width between it and the lower cuesta, if the weak stratum between the harder is of sufficient thickness.

First Cycle of Erosion

A coastal plain in the first cycle of erosion. The presence of two hard layers produces a terraced cuesta…

North-south section across western New York, showing the three cuestas and lowlands and the tilting of the peneplane.

New York Peneplane

North-south section across western New York, showing the three cuestas and lowlands and the tilting…