10 
Hill, consisting of previously-deposited materials, was its west- 
ern shore.” For further accounts of Lake Agassiz, the following 
may be consulted: Upham (1895); Wallace (1925); Antevs (1931); 
Leverett (1932); and Johnston (1946). An excellent account of 
the Pleistocene geology of southwestern Manitoba is given by 
Elson (1954). 
Coombs (1954) describes the continental part of the Hudson 
Bay Lowlands as “a flat, swampy plain with a slight downward 
slope toward its coastal regions along James and Hudson Bays”, 
located on the west side of the latter bays between Nottaway 
River in Quebec and Churchill River in Manitoba. Churchill is 
situated at the northwestern extremity of the “Coastal Zone” 
bordering the bays. A narrow “Dry Zone” occurs to the west and 
S. Hearne’s name on the smooth glaciated rock at Sloop's Cove, 
near Churchill, 
south of the James Bay Coastal Zone, and still farther west is a 
“Muskeg and Small Lake Zone”, extending northward to Severn 
River. That part of the Lowlands between the Severn and Chur- 
chill rivers, exclusive of the narrow Coastal Zone, is termed the 
