

i"-^:- ■ •■.-. 





iz^i 



Figure 12. — Floor of crater 4 from its north rim. The scale of the photograph can be gauged from the 

 figure standing near the base of the south wall. 



Figure l.i. — Crater 4 from its floor near the south wall, lookine toward the west i 



Figure 14. — Crater 5 from its almost imperceptible east rim. Erosion has so reduced this rim that this 

 crater is now one of the more inconspicuous; it is noticeable primarily because of the fine sediments 

 covering its floor and because of its trees. 



211 



