from The Century Dictionary and Cyclopedia
- n. In petrography, a name given by Ransome (1898) to volcanic rocks intermediate in composition between trachyte and andesite: the lava equivalent of monzonite.
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This gigantic wall, broken through in several places by flowing rivers, is nothing more nor less than a mighty stream of congealed basaltic lava called latite, which in prehistoric times, rushing down the western flank of the high Sierras, usurped the bed of an ancient river channel, drinking up the waters and piling up its molten mass bank high.
Silicified quartz latite porphyry was mapped in a centrally located, east - trending zone measuring approximately 1,500 ft, - long and from 300 ft to 400 ft.- wide.
Most anomalous samples were collected from silicified quartz latite porphyry containing occasional mm-scale quartz veins, quartz breccia veins, and carbonate veining although a few were from carbonate altered breccia and sheared Archean gneiss.
The QL claims 2,035 acres cover two regional faults, one of which is intruded by a quartz latite pluton lying adjacent to and immediately east of EVG claims.
The BG claims 1,517 acres cover Eocene -aged quartz latite plutons and associated intrusive breccia bodies located in the southwestern Rattlesnake Hills volcanic field.
Bear geologists recently completed 1:12,000 and 1:3,000 scale geologic maps recognizing two new intrusive breccia bodies 0.5 km. sq. and 3.0 km sq. , several breccia dikes, and larger areas of quartz latite porphyry containing silicic, carbonate, and iron oxide alteration.
The 144 zone has been extended to the north, west and south, and high grade gold mineralization has been discovered in the latite dike that divides the 144 zone from its east extension.