Plate XI 



Fig. 18. Evaporation rates at bottom (3) and near the top of the northwest (5) 

 md the southeast-facing (7) slopes of the ravine. Stations 3, 5, and 7 



Fig. 19. Evaporation rates at foot of the northwest facing slope (3), and 

 middle (b) ana top (7) of the southeast-facing slope of the most mesophytic 

 portion of the ravine. Stations 3, 6, and 7 



