. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. onio creeks. Vein 2 feet wide, very base, containing pyrite,zinc blende and galena, in mica schist. Shaft 200 feet deep on W. Emerson and Bert Del Ray, of San Francisco, owners. Great Western Mine (quartz). It is 4 miles southwest of SheepRanch, on ridge between Indian and San Antonio creeks. Claims areGreat Western, Florence, Helena, and Annie Fraction. Total, 73 is 2 feet wide, with a course of N. 55° W., dip 65° NE. Work 84 MINES AND MINERAL RESOURCES
. Appendix to the Journals of the Senate and Assembly of the ... session of the Legislature of the State of California. onio creeks. Vein 2 feet wide, very base, containing pyrite,zinc blende and galena, in mica schist. Shaft 200 feet deep on W. Emerson and Bert Del Ray, of San Francisco, owners. Great Western Mine (quartz). It is 4 miles southwest of SheepRanch, on ridge between Indian and San Antonio creeks. Claims areGreat Western, Florence, Helena, and Annie Fraction. Total, 73 is 2 feet wide, with a course of N. 55° W., dip 65° NE. Work 84 MINES AND MINERAL RESOURCES. carried on through three tunnels, upper 175 feet long, middle 280 feet,lower 520 feet in length, which gives 400 feet of backs. The walls area dark siliceous slate, and the quartz is found intimately associatedwith a porphyry dike. Three men are employed. H. J. Shepherd,Riley & Sons, 32 Glenn avenue, Oakland, owners; W. D. Riley, of Mur-phy, agent. Giiiffra Mine (quartz). At Mokelumne Hill, on Stockton 105 feet deep, caved. Ten-stamp mill on property. Idle. JohnGuifPra of Mokelumne Hill, View of steel gallows frame at Gwin Mine, Calaveras County. Gwin Mine (quartz). (See Reports VI, Pt. II, p. 30; X, p. 67;XII, p. 93. Folio 63, U. S. G. S., Mother Lode District.) Located 4miles southwest of Mokelumne Hill at an elevation of 1040 feet, ina belt of Mariposa slates. The Gwin vein strikes with the slates and isgenerally parallel with their cleavage. It is accompanied by stringers,and varies in width, but is more of a regular vein than a stringer encountered in sinking the Gwin shaft are diabase tuff,clay slates and small acid dike rocks. Strike of main vein is N. 12° W.,with a dip 68° E. which has a soft black slate gouge on footwall, withblack slates on hanging-wall. The ore shoots of the main vein are ofgreat length, varying in width from a few inches to 20 feet. The veinis usually of a banded structure and exhibits a branching tendencywi
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Keywords: ., bookauthorcaliforn, bookcentury1800, bookdecade1850, bookyear1853
