/w^ 



MANUAL OF GEOLOGY 



/ 



TREATING OF THE PRINCIPLES OE THE SCIENCE 



WITH SPECIAL REFERENCE TO AMERICAN 



GEOLOGICAL HISTORY 



BY 



JAMES D. DANA 



PROFESSOR EMERITUS OF GEOLOGY AND MINERALOGY IN YALE UNIVERSITY: AUTHOR OF 



A SYSTEM OF MINERALOGY ; CORALS AND CORAL ISLANDS ; VOLCANOES ; REPORTS 



OF WILKES'S EXPLORING EXPEDITION, ON GEOLOGY, ON 



ZOOPHYTES, AND ON CRUSTACEA, ETC. 



" Speak to the Earth and it shall teach thee " 



ILLUSTRATED BY OVER FIFTEEN HUNDRED AND SEVENTY-FIVE FIGURES 

 IN THE TEXT, AND TWO DOUBLE-PAGE MAPS 



FOURTH EDITION 



NEW YORK . : • CINCINNATI • : • CHICAGO 



AMERICAN BOOK COMPANY 



LONDON: TRtJBNER AND CO. 



1896 



