Memorandum: Cinder Lake Crater Field Seismic Profiles

Enclosed are the seismic profiles and a plan of the seismic lines at the new Cinder Lake Crater Field in Yavapai county. Along the East-West line the upper layer is made up of 3.5 feet of cinders on the top and then becoming mixed with clay t o a depth of 7.5 to 11.0 feet below the surface. Beneath this is a 10 to 20 foot thick layer of denser cinders or some other unconsolidated material. The third layer, with velocities from 5100 to 5950 ft. per sec., is probably a lava similar to that at Kona-A.