From 850 to 1020 feet depth the boring has continued in Eocene carbonaceous silty sands and clays of the Knight Group. The sands in this interval are less uniform in grain size than those above 835 feet, and are markedly coarser below 995 feet....

Objectives. Description of aircraft and magnetometer. Positional control. Timing. Base maps used. Methods of flying (3000 barometric). B-W Lines 4-8 miles apart E.W. N-S Tie lines 16 miles apart. Magnetic and flight line control. Reduction of data. 1...