The quicksilver resources of California . reopening some of the old works. A1-^\- /, o I 1 1 200 €fyv,^;,... -s^.. w. , ?•?/?I?/ ?^• — 6, .•- e ? - Fig. 31. St. John Mine—Section east and west over main tunnel shaft. The mine is located in a basin between Mount Luffman tothe west and Mount St. John to the east. These mountainsare characterized by the bold outcrops of two bodies of meta-morphic sandstones. Nearh^ the entire inter\-ening surface iscovered by sandstone debris, but all the dumps of the oldtunnels show schist, and in some of the larger cuts the contactof the .schists and san
The quicksilver resources of California . reopening some of the old works. A1-^\- /, o I 1 1 200 €fyv,^;,... -s^.. w. , ?•?/?I?/ ?^• — 6, .•- e ? - Fig. 31. St. John Mine—Section east and west over main tunnel shaft. The mine is located in a basin between Mount Luffman tothe west and Mount St. John to the east. These mountainsare characterized by the bold outcrops of two bodies of meta-morphic sandstones. Nearh^ the entire inter\-ening surface iscovered by sandstone debris, but all the dumps of the oldtunnels show schist, and in some of the larger cuts the contactof the .schists and sandstones can be found. The sandstonesespecially those of the Mount St. John ridge, show a prominentnorth and south fracture system. The schists probabh- lie ina trough, having a general northern trend in the sandstone 1 1 ^HH I^^H Hl^^^ ^^^1 wSi 0 1^^ ^?^^= *^^l J^M i^riH ^^1 n ^^^^^K.^ Hi ^^^^^^^^^^^^^^ .^^^^?1 ^1 K J •. I^^^B ? ^^fcigv .^^.^^icrr , 1, ^j-.^. .; T PHOTO No. 8. ST. JOHN MINE AND
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectminesandmineralresou
