AN INTRODUCTION TO GEOLOGY
FOR THE STUDENT AND THE GENERAL READER
BY
WILLIAM HERBERT HOBBS
PROFESSOR OF GEOLOGY IN THE UNIVERSITY OF MICHIGAN
AUTHOR OF “EARTHQUAKES. AN INTRODUCTION TO
SEISMIC GEOLOGY”; “CHARACTERISTICS OF
EXISTING GLACIERS”; ETC.
New York THE MACMILLAN COMPANY 1921
All rights reserved
Copyright, 1912, By THE MACMILLAN COMPANY.
Norwood Press J. S. Cushing Co.—Berwick & Smith Co. Norwood, Mass., U.S.A.