192 EECORD OF DEEP- WELL DRILLING FOR 1905. 
Record of well in Rancho Pastoria de las Borregas, 1\ miles north of Sunnyvale. 
Feet. 
Adobe and yellow clay with water gravel at 12-14 and 18-24 feet 0-26 
Gravel ; water-bearing , . . 26- 34 
Soft light and dark blue clay with water-bearing gravel at 81-83 feet 34-150 
Soft yellow clay with gravel 150-178 
Gravel; water-bearing; flow at surface 50 gallons per minute 178-182 
Dark blue clay 182-23? 
Blue quicksand 234-250 
Soft yellow clay 250-270 
Yellow sand and gravel, with some water 270-281 
Soft yellow clay 281-300 
Dark and light blue clay. 300-340 
Soft yellow clay 340-358 
Sand and gravel: water bearing; flow of 150 gallons per minute at surface... .. 358-360 
Rig used, rotary hand tools. Diameter of well, 7 inches. Flows 200 gallons per minute! 
Casing perforated at 178 to 182 feet and also, to admit water from last gravel bed, at 21 feet 
from bottom. 
172. Well near Portersville, Tulare County. 
[Well begun .Mine 12, 1905; completed June 24, L905 Authority, II. M. Lee, contractor and driller. 
Samples preserved.] 
The beds of clay and sand in which this well is sunk represent material deposited in a 
fresh-water lake of which Tulare Lake is a shrunken remnant. The beds are of Pleistocene 
age. 
Record of well in sec. 18, T. 22, R. 28, If. miles south of Portersville. Feet. 
Black soil 0-40 
Red clay 40-50 
Soft grayish, brownish, and reddish clay 50-110 
Sand and gravel wit li pebbles 2 inches in diameter and larger; water-bearing 1 10-120 
Soft, st ickv yellow shale or clay 120-155 
Quicksand (silt and fine and coarse sand); water-bearing 155-160 
Rig used, California. Diameter of well, 11 inches. Casing of No. 18 iron plate, riveted, 
perforated for 20 feet at bottom. Well pumped by single-action 7-inch by 34-inch pump, 
driven by gasoline engine. Yield, 135 gallons per minute. Water is very soft. Tempera- 
ture, 72° F. 
174. Well near Ventura, Ventura County. 
[Well begun and completed in 1905. Authority, Mound Water Company, owner. Samples preserved.] 
The gravels, sands, and clays penetrated by this well are of marine origin and of Pleisto- 
cene age. 
Record of well 5 miles east of Ventura. Feet. 
Gravel .' 0-52 
Sand 52-62 
Greenish clay 62-23C 
Dark clay 230-28* 
Coarse sand 287-29( j 
Granite pebbles and bowlders 290-31' ; 
Sand and gravel 312-49( ', 
