70 .^ 5 MEM. MUS. COMP, ZOOL 



GEOLOGY CAPE COD. PLATE 1 



70' is' 



Weepeeket 

 bland 



70'45 



EXPLANATION 



Swamps (fresh) 

 (Probably contain peat) 



« < 



Marshes (salt) 

 (Probably contain peat) 



Beach and dune sand and gravel 



BISHOPS CLERK'S LIGHT* 



20 WILLIAMS & HEINTZ C0,WASH,DC 



Base from U. S. Geological Survey topographic 

 maps of Plymouth, Barnstable, and 

 Falmouth quadrangles, reprinted from earlier 

 editions without revision 



GEOLOGIC MAP OF CAPE COD PENINSULA, MASS. (WEST HALF) 



Scale G2SOO 



~V o 



6 Kilome"ters 



Contour inter-val 20 feet . 



Datum is m&m- s^-a IweL- 



Geology by J. E. Woodworth, 



U. S. Geological Survey, 



Gilbert Hart, field assistant, 1916 



2 < 



Sand and gravel 



Ground moraine of Buzzards Bay lobe 

 (Sandy, probably clay and sand and gravel 



>■ 

 rr 

 < 

 z 

 rr 

 > w 



< 



a 



Drumlin 

 (Elliptical hill of glacial drift) 



Falmouth moraine 



( Thin bouldery glacial drift overlying outwash 

 sand and gravel and older Pleistocene 

 deposits) 



Sand and gravel outwash from Falmouth 

 moraine 



(Overlies older Pleistocene deposits) 



Glacial till, boulders, sand and gravel of 

 Nantucket substage 



Q 



-z. 



< 



>- 



rr 



Pre-Wisconsin Pleistocene blue clay, prob- } ^ 

 ably Montauk till member of Man- 

 hasset formation(?)or Gardiners clay(? 

 and Miocene greensand 



(Only outcrop known) 



>- 

 rr 

 < 



rr 



UJ 



I- 

 < 



a 



