Go.pTHwairT, — Sand Plains. 
PLATE 5. 
Map of Glacial Lake Sudbury, showing the probable boundary of the lake and the 
distribution of sand plains and eskers within its limits. ‘The altitudes of lobes 
and of passes in the rim of the basin are given in feet (above mean low water, 
— Boston City base). The separation into groups, marking several successive 
water-planes, seems justifiable in view of the data presented in this paper, and 
summed up in Plate 4. 
