286 RECORD OF DEEP-WELL DRILLING FOR 190;*). 
Record of well on Charles E. Stau ffer farm, 8 miles east of Taylor. 
Feet. 
Black soil - - 0- 10 
Gravel; water-bearing 10- 13 
Soft shale or clay mixed with oyster shells 13- 980 
Hard rock, with gravel 980-1, 235 
Soft blue clay 1,235-1,275 
Hard rock, with gravel and oyster shells 1 , 275-1 , 500 
Rig used, rotary. Diameter of well, 5 inches from top to bottom. No water found 
except the top seep at 13 feet. 
17(>G. "Well in Zavalla County. 
[Well begun February L5, 1904; completed April 1, 1905. Authority, E. A. Archibald, contractor and* 
driller. No samples.] 
This flowing well, 22 miles north of Carrizo Springs, was obtained by drilling through a 
water-bearing sandstone, thai may be of Eocene age and form part of the Myrick formation. 
Record of well 6 miles north of county line and Jf miles west of Nueces River. 
Feet. 
Blue clay formation, hard and slakes when touched with water; dry', "all 
colors, and no two feet alike '' -550 
Sand — water-bearing; water rose within 20 feet of surface 550 -570 I 
Clay and thin layers of lock: "a loot of rock, a foot of clay, 2 feet of rock, etc." 570 -050 
Sandstone — water-bearing; How 5 gallons per minute 650 -675 
Rock and clay 675 -715 
Iron pyrite 715 -716| 
Coarse light sandstone. 7162-796 
Blue rock 796 -810 
Coarse gray sandstone ' 810 -905 
Gray clay, hard and dry, caving oil' by chunks, a little rock on top of the clay. . 905 -910 
Rig used, cable Casing used, 720 feet of 8-inch. Principal water bed at 720 feet... 
Static head of flow, -\-2\ feet . Well has to be pumped to start flow and flow can be stopped 
by lowering the sand bucket in the well. Pumping 100 gallons per minute depresses water 
L5 feet. Quality of water, slightly sulphuretted. Temperature, 90° F. Elevation of well 
mouth, 60 feet above Nueces River. 
UTAH. 
17<>7. Well at Salt hake City, Sail Lake County. 
[Well begun June 23, L905; completed July 7, L905. Authority, Frank Yeager, contractor and driller. 
No samples.] 
This well gives a characteristic section of the alternating beds of clay, sand, and gravel 
that were deposited in Pleistocene time in Lake Bonneville, a great sheet of prevailingly 
fresh water that occupied Salt Lake Valley. Salt Lake is a remnant of Lake Bonneville. 
The water-bearing sands and gravels of the old lake bed lie in lenticular bodies of varying 
extent, so that logs of near-by wells often differ decidedly and there are no definite water- 
bearing horizons. One well may pass through several water-bearing sands and anothei 
just as deep a short distance away may not find more than half the number. The character 
of the lake beds and the supplies of water they may yield are described in Water-Suppl) 
and Irrigation Paper No. 157, "Underground waters of the valleys of Utah Lake aiu 
Jordan River," by G. B. Richardson. 
Record of well at Salt Lake City. 
Soil _ j 
Blue clay 22 6! 
Dark blue clay 62- 9' 
