Geology is a science of such rapid growth that no apology is expected
when from time to time a new text-book is added to those already in the
field. The present work, however, is the outcome of the need of a
text-book of very simple outline, in which causes and their consequences
should be knit together as closely as possible,--a need long felt by the
author in his teaching, and perhaps by other teachers also. The author
has ventured, therefore, to depart from the common usage which
subdivides geology into a number of departments,--dynamical, structural,
physiographic, and historical,--and to treat in immediate connection
with each geological process the land forms and the rock structures
which it has produced.
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