pROc. Staten Is. Assoc. 



Vol. 5, Plate 4 



iWil a a. ^ " " _ ^ 'ismmmtt 



Fig. I. Ditch cut through peat bed at northeast end. 

















yr^.'^--^> !''%■: 



Fig. 2. Shrinkage cracks, surface of silt deposit toward middle of former lake bottom. 

 HoLLic^c: Silver Lake Basin 



