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| a 2 § | EXPLANATION Thickness A\% 
q Fs : 8 4 in feet 
2 eee i E A Lava, black (basalt, ete. ) } 
pigs r : : 
2B = tee B Sand and gravel (valley filling) 1000, | 
| eae z ; 
ma aria = C Lava, gray (andesite) Tertiary 
Valenti Oras ‘ ; Carboniferous 
a ne ra cee s D s j to ne red Supai formation 1000 (P. lyanian) | 
I ca pees ; 
Carboniferous 
: 3 E Limestone, massive,gray Redwall 800 < (Pennsylvanian 
z  enaeatai : and Mississippian) | 
rf FE ao gray, and shale, Tonto group Reg 100 Cambri | 
z greenis 
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: F G Granite and schist Pre-Cambrian. | | | 
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| wo Q PA | 
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o& Scale 500,000 | | 
o Approximately 8 miles to ! inch | 
ee Pe FP 
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Contour interval 200 feet 
ELEVATIONS IN FEET ABOVE MEAN SEA LEVEL 
ES Sy : y 10 
The crossties on the railraads are spaced | mile apart 
14" H3 30’ 
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