ABSTRACT
In the previous two volumes in this series little has been written regarding the relationship between the earth’s surface relief features and crustal changes. Certain primitive notions on the origin of mountains prior to about 1830 were touched on in volume 1 (part 1); Davis’ ideas regarding the tectonic history of the Appalachians appeared in volume 2 (chapter 11); and Walter Penck’s tectonic assumptions were set out in volume 2 (chapter 23). It is now necessary, however, to describe some of the more important researches dealing with the tectonic framework of geomorphology between about the middle of the nineteenth century and the general acceptance of plate tectonics in the 1950s and 1960s.
