Plan. 

a 
Section on line 

Figure 1—Glacial striation crossing a pre-formed 
hollow. (§ 471.) 

Figure 2— Perched blocks. (§ 476 ) 

Figure 3—Glaciation of a point, indicating lateral pressure. (§ 471.) a, 
| elevation. 0, sectional elevation in a plane at right angles to a. 
INSTANCES OF GLACIATION—LAKE OF THE WOODS. 
Face p. 207. 



