Composition of Soils in Arizona.
Reading edition
(Accompanying Geological Report, Wheeler Expedition, 1875.)
Moquis Villages. Chevelon’s Fork. Mogollon Mesa. San Francisco Mountains. Rio San Pedro. Camp Grant. Rio Gila.
Predominating rock Sandstone. Sandstone. Sandstone. Basalt. Granite and rhyolite. Granite. Basalt and rhyolite.
Sand 72.04 53.10 42.20 15.95 14.00 61.20
Silt, with some clay 27.96 43.55 37.98 62.97 75.40 34.07 92.26
Potassa 0.072 0.092 0.115 0.130 0.401 0.131 0.242
Soda, Traces. 0.010 Trace. 0.017 0.051 0.014 0.039
Lime 1.665 0.319 0.153 0.684 4.356 1.998 1.798
Magnesia } 2.327 2.559 0.029 Trace. 1.019 0.203 0.570
Alumina } 2.013 9.729 6.850 2.304 2.311
Oxide of iron
Phosphoric acid 0.031 0.070 0.058 0.284 0.213 0.095 0.214
Sulphuric acid Trace. Trace. Trace. Trace. Trace. 0.010 Traces.
Hydroscopic water 2.221 1.89 10.97 12.83 6.09 2.80 4.98
Chemically-bound water and organic matter 1,529 1.46 8.84 8.25 4.51 1.93 2.76
Insoluble in
hydrochloric acid 94.60 93.55 77.81 71.09 71.10 87.52 84.85
Among the secondary precious stones that have been found in Arizona are black and green tourmalines, peridots, beautiful garnets of every tint, bloodstone, jaspers and agate of every character, while fire and white opals are found in certain localities. Zircona, in crystals, very minute, of the cube form, and in masses, has been discovered. Sufficient vein matter has not been found to determine any rich deposit of fine crystals.