Tb - Volcanic Rocks
Tb - Volcanic Rocks
Approximate Thickness
0-1,400 feet.
Lithologic Description
Primarily olivine basalt flows and associated andesite flows, dikes, cinder cones, and volcanic sedimentary rocks including cinder and ash beds and tuffs.
Water-Bearing Characteristics
Generally above the water table; yields small amounts of water to springs and a few wells in the northern, eastern, and southern parts of the area.
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