

CONTENTS. 



Letter of transmittal 



Preface xm 



Part I.— Geology ok the Green mountains in Massachusetts, by Raphael Pumpelly. 



General description 

 Age and structure . . 



Correlation 



Part II.— The geology of Hoosac mountain and adjacent territory, by J. E. Wolff. 



Introduction 



Topographic work 



Topography 



Description of rocks of Hoosac mountain ** 



The Stamford gneiss - i5 



The Vermont formation 4 ° 



The Hoosac schist 59 



The Stockbridge limestone 64 



Amphibolites 



Geology - 69 



The Hoosac tunnel 



The region embracing the central part of Hoosic mountain 72 



The northern and eastern schist area 8t> 



The region south of Cheshire and of the Hoosic valley 88 



Hoosic valley schist 



The region around Clarksburg mountain and Stamford, Vermont 98 



General conclusions 



Part III.— Mount Greylock: its aheal and structural geology, by T. Nelson Dale. 



125 

 Outline of this papei 



.,. , • 131 



Historic 



_. .. 133 



Ph vsiographic 



' . . 136 



Structural 



Types of structure 



Correlation of cleavage and stratification loa 



„.. . 157 



Pitch 



157 

 Structural principles 



Structural transverse sections 



175 

 Longitutional sections 



177 

 Resume, structural 



179 

 Lithologic stratigraphy 



