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EARTH FEATURES AND THEIR MEANING
THE MACMILLAN COMPANY
NEW YORK · BOSTON · CHICAGODALLAS · SAN FRANCISCO
MACMILLAN & CO., Limited
LONDON · BOMBAY · CALCUTTAMELBOURNE
THE MACMILLAN CO. OF CANADA, Ltd.
TORONTO
Plate 1.
Mount Balfour and the Balfour Glacier in the Selkirks.
EARTH FEATURESAND
THEIR MEANING
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 YorkTHE MACMILLAN COMPANY1921
All rights reserved
Copyright, 1912,By THE MACMILLAN COMPANY.
Norwood PressJ. S. Cushing Co.—Berwick & Smith Co.Norwood, Mass., U.S.A.
TO THE MEMORY
OF
GEORGE HUNTINGTON WILLIAMS
PREFACE
The series of readings contained in the present volume give insomewhat expanded form the substance of a course of illustratedlectures which has now for several years been delivered eachsemester at the University of Michigan. The keynote of the coursemay be found in the dominant characteristics of the diff