PANOCnE DISTIMCT. 379 



To the south of this spring- deposit in a hill of" asperite and at the con- 

 tact between this lava and the unaltered shale Mr. Turner found cinnabar. 

 It is associated with copper pyrites and calcite and in some cases is so in- 

 termingled with the latter as to show simultaneous deposition. There seems 

 to be no quartz or opal at this point. This is the third locality in California 

 at which cinnabar is found associated with andesite, and the circumstances 

 are such as to leave little or no doubt that the de})Osition took place from 

 hot sulphur springs, induced by volcanic action. 



Traces of cinnabar. — The dlscovery of ciuuabar at Point Reyes was reported 

 in 187;-).' There is no improbability in the statement, but I have heard of 

 no confirmation of the report and hesitate to enter it on the map. Pro- 

 fessor Whitney states that small quantities of cinnabar and mercury were 

 found in early days near the Mission, in San Francisco, in rocks of the 

 usual t}'pe. 



Santa Clara County—Besides the Xew Almadeu, Enriquita, and Guadalupe, 

 which form the subject for Chapter X, a small mine called the Snn Juan 

 Bautista was worked in former years. It is in the northeastern portion of 

 an isolated range or cluster of hills bearing the same name and is about 

 four miles southeast of San Jose. The hills are composed of metamorphic 

 rocks, largely serpentine. The ore deposits were iri'egular, but seemed in 

 a general way to follow the stratification. Mr. Goodyear (loc. cit.) notes 

 the presence of chalcedonic silica and of a hard, dark-gray, granular, crys- 

 talline rock, which was probably pseudodiabase. My party has not visited 

 this deposit 



panoche district. — Pauoche Pass, which is near the junction of Fresno, 

 Merced, and San Benito Counties, leads from the area drained by the 

 Pajaro River to that drained by the San Joaquin. The divide forms a por- 

 tion of the somewhat irregular mountain system called by Professor Whit- 

 ney the Mt. Diablo Range and is composed of rocks identical in character 

 with the central metamorphic mass of Mt. Diablo. There is no reason for 

 supposing these rocks to be of different age from those of Mt. Diablo and 

 Knoxville, and there is considerable evidence that like them they are Neo- 

 comian, but no fossils were found in them. The surrounding countr}- con- 



' Mining and Scientific Press, February 27, 1875. 



