Front:
H-1504
GRANITE GORGE FROM BRIGHT ANGEL TRAIL, GRAND CANYON NATIONAL PARK, ARIZONA.
Back:
2504
Freel "PHOSTINT"
ARVEY
TRADE MARK REG. U. S. PAT. OFT.
MAOS ONLY BY DETROIT PUBLISHING CO
15
Down by the river the walls are composed of
black gneiss, slates and schists, traversed by dikes
of granite. Then there are 800 feet of quartzites,
then 500 feet of greenish sandstone, then 700 feet
called alcove limestone, above which is 1600 feet
of limestone, known as redwall limestone, then
800 feet of banded sandstone and at the top 1000
feet of Aubrey limestone. These are the elements
with which the walls are constructed, from black
buttress below to alabaster tower above.
80716
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