34 A Bibliography of the Geology, etc., of Calif or u 



HI. 



Bulletin No. 23. {Continued.) 



$11,917,762. To this may be added, say, $5,000,000 for last year 

 and we have a grand total of $17,000,000 in round numbers to the 

 credit of six years' operations in one county. 



The following statement shows the product of each copper-yield- 

 ing county in the year 1900 : 



Pounds. Value. 



Amador 220,000 $ 84.100 



Calaveras 980,934 150,585 



El Dorado 3,125 500 



Kern 4.000 750 



Madera 500,000 77,500 



Nevada 150,980 20,472 



San Bernardino 1,920,000 297,000 



Shasta 25,730,473 4,160,735 



Totals 29,515,512 $4,748,242 



In 1901 the field of operations was extended and the following 

 counties ranked as copper producers : 



Pounds. Value. 



Alameda 13,728 $ 2,162 



Alpine 8,377 1,319 



Amador .52,000 8,190 



Calaveras 1,701,589 268,000 



Fresno 1,159,672 182,648 



Inyo 8,566 1,349 



Kern 429,248 67,606 



Madera 108,430 17,077 



Mariposa 191,622 30,180 



Merced 79,071 12,453 



Mono 1,938 305 



Nevada 39,588 6,235 



Placer 11,200 1,764 



Sacramento 2,007 316 



San Bernardino 50,000 7,875 



Shasta . 30,990,781 4,881,048 



Stanislaus 79,330 12,494 



Trinity • 4,838 761 



Totals 34,931,985 $5,501,782 



A study of the map which Mr. Anbury includes shows a con- 

 tinuous belt in the Sierra foothill country following a well-defined 

 course from the southern border of Butte County to Riverside — a 

 distance of about 400 miles. A northern extension of this belt 

 diverts somewhat to the northeast and traverses Sierra, Plumas, 

 and Lassen counties. Then an outer copper belt extends in an 

 almost continuous line from San Francisco Bay to the Oregon 

 boundary line in Del Norte County. 



The three principal mineral products of California last year were 

 gold, copper, and petroleum. 



