x CONTENTS 



Thickness .... 



Source of materials . 



Relation to other deposits 



Structure .... 



Conditions during deposition 



Distribution and outcrops 



Age . 

 Vineyard interglacial stage 

 Wisconsin drift 

 Subdivisions 

 The till sheet . 



Character 



Source of materials 



Relation to earlier deposits 



Distribution 

 Nantucket moraine . 



Origin and character 



Distribution 

 Outwash deposits 

 Bibliography of the geology of Marthas Vineyard 



Chapter III. — Geology of No Mans Land, by J. B. Woodworth 

 Location .... 

 Geographical features . 

 Descriptive geology 



Earlier investigations 



Pre-Wisconsin deposits 



Wisconsin drift 



Marine action 



Chapter IV. — Geology of Block Island, by J. B. Woodworth 

 History and geography .... 



Geology . 



Pre-Cretaceous basement 

 Upper Cretaceous deposits 



Character and distribution 



The white clay 



The lignitic clay .... 



Fossil flora 



Tertiary material in Pleistocene glacial drift 

 Miocene boulder .... 

 Eocene material in recent wreckage 

 Pleistocene formations 



Classification .... 



Character of the formations . 

 Basal Pleistocene of Clay Head section 

 Vineyard interglacial stage 

 Nantucket moraine 



Character and extent 

 Glacial boulders 

 Direction of drift shown by boulders 



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