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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…

Profile of the Hudson River from New York City through the Highlands, showing the fjord-like excavation above the mouth and the gradual northward rise of the peneplane.

Hudson River

Profile of the Hudson River from New York City through the Highlands, showing the fjord-like excavation…

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…

Diagram showing the development of a peneplane from anticlinal ridges and the reappearance of the uniclinal topography after elevation and renewed erosion. This is the type of structure found in the Appalachians.

Development of a Peneplane

Diagram showing the development of a peneplane from anticlinal ridges and the reappearance of the uniclinal…