WATER-BEARING FORMATIONS OK SALINAS VALLEY. 



211 



lying limy sand beds occur at nearh' all the places where the terrace fomiation was 

 observed. 



On the western side of the Salinas Valley, from the south boundary of Monterey 

 County to near Paraiso Springs, the rock in place is shale. It is the same in the San 

 Antonio and Nacimiento River valleys where traced. 



In a cut on the Southern Pacific Railroad about 2 miles northwest of Bradley 

 there is a good exposure of some of the beds of the terrace in an anticline. (Fig. 8.) 



But few satisfactory well records were obtained. The first six of the following 

 were furnished to Professor Marx by D'Arcy Porter, of Salinas City. 



A 7-inch well in the river bottom near the factory of the Spreckels Sugar Com- 

 pany. 4 miles south of Salinas Citj': 



From 1 foot to 11 feet, sediment, water; from 11 to 37 feet, blue sand; from 37 to 55 feet, blue sandy 

 clay; from 55 to 80 feet, blue clay; from 80 to 92 feet, blue sandy clay; from 92 to 96 feet, blue sand; 

 from 96 to 97 feet, small rocks; from 97 to 117 feet, blue fine gravel; from 117 to 134 feet, brown fine 

 gravel; from 134 to 149 feet, coarse gravel; from 149 to 159 feet, coarse gravel and rocks, water; from 

 159 to 162 feet, yellow clay. 



Aboift 'A mile 



Fio. 8. — Northern slope of anticline cut by railroad 2 miles northwest of Bradley. The thin seam of lignile has gypsum 

 mixed with it, The fossils are limpets,' turritellas, and various elam and oyster shells. 



A 10-inch well one-half mile from the ocean: 



From 1 foot to 2 feet, adote sediment, water at 4 feet; from 2 to 10 feet, blue sand; from 10 to 22 

 feet, blue clay; from 22 to 48 feet, fine gravel; from 48 to 63 feet, black hard clay; from 63 to 127 feet, 

 fine gravel; from 127 to 131 feet, coarse gravel and rocks; from 131 to 135 feet, red, hard dry sand. 



A well 7 inches in diameter, 9 miles east of Salinas and 1 mile southwest from 



the Gabilan Peak: 



From 1 foot to 20 feet, red dirt and fine gravel; from 20 to 62 feet, red dirt and coarse gravel; 

 from 62 to 95 feet, red clay and gravel; from 95 to 99 feet, coarse gravel; from 99 to 114 feet, yellow 

 clay, water; from 114 to 135 feet, coarse gravel; from 135 to 137 feet, yellow clay. 



A well in the city of Salinas: 



From 1 foot to 6 feet, black loam sediment, water at 14 feet; from 6 to 22 feet, sediment; from 22 

 to 46 feet, yellow clay; from 46 to 43 feet, clay and gravel; from 48 to 65 feet, blue clay; from 65 to 

 77 feet, yellow clay and gravel; from 77 to 84 feet, coarse gravel, water; from 84 to 94 feet, fine gravel; 

 from 94 to 147 feet, yellow clay; from 147 to 154 feet, fine gravel; from 154 to 229 feet, coarse gravel 

 with rocks, water. 



A well halfway between Salinas and Santa Rita: 



From 1 foot to 84 feet, red dirt with a little gravel; from 84 to 90 feet, gravel, water; from 90 to 

 115 feet, yellow clay; from 115 to 216 feet, blue clay with clam shells and pieces of redwood. 



A well 2 miles northeast of Santa Rita: 



From 1 foot to 140 feet, reil dirt and yellow clay; then went into a brown porous rock ftill of 

 water, but did not go through it. 



