204 



INDEX 



Pane 



Foramlnifera 21.23.24,25,45,70,75 



Forbes, Alexander J7S 



Forstner, William, cited 189 



Fossils, chert of Franciscan croup IS 



diagnostic of the age of the Franciscan 



group 45 



Eocene limestone 70 



Late Cretaceous age, of Sierra Anil 66 



Montery shale 75 



Temblor formation 71,73 



Upper Cretaceous age, of Santa Teresa 



Hills 8 



Fractures 26,5*. 104 



hilos 110, 113, 115, 122, 162 



tension 90, Sf 



Franciscan group 10 



65, 78, 78, 82, 84, 85, 90, 91, 101, 108. 

 130, 132, 134, 136, 137, 142, 145, 156, 

 158, 160, 165, 173. 



age 



formation of ore 104 



hllo fractures Ill 



manganese-bearing chert lenses IK 



ore bodies In rocks Its 



ores formed by replacement of graywacke 



and shale IOS 



origin 4S 



thickness 48 



unconformities 86 



Furst, E. J 159, J9J 



Q 



Oabbros S7 



Geologic structure of California Coast Ranges . 77 



Geologic studies, summary of previous 78 



Oeology, America mine J5/ 



Central stope area Ifl 



Cora Blanc* area 1ft 



Enrlqulta mine 152 



Guadalupe mine area ISS 



Harry area 134 



North Randol area 141 



Providencla mine J*f 



San Antonio mine 



San Francisco area H7 



San Mateo mine lli 



San Pedro-Almaden workings H9 



Santa Mariana area US 



Senator mine ISO 



South Randol area US 



Velasco vea ISS 



Victoria are* 139 



Oeosyncllne In California 46 



Olaucophane rocks 37 



megascopic feature* 40 



microscopic feature* 40 



origin , 46 



Gossan tone containing oxidized copper 



mineral* 125 



Grkywacke, feldspatlc, In Upper Cretaceous 



rock* 8S 



Franciscan group 10, IS, 46, 108, 1S4 



chemical features IS 



megascopic feature* IS 



microscopic feature* IS 



Greenstone* 10,29,30, 108 



chemical composition 55 



thickness 48 



Grunsky. C. E., died 6 



Guadalupe I.lme Co 126 



Ouadatupe mine 7,84, 



96, 97. 107. 119. 122, 123, 161, till, 176, 191 



l)ore Labor 107, 187, 168. 171 



dumps 171 



Kant Hilltop workings 167,168,169 



history ISS 



Kelly are* 164,165,166 



Kelly cuts /SS, 171 



Kelly tunnel ISS 



Ouadalupe mine Continued Page 



Kelly workings 16fi. 167. 168 



mine workings 164 



New, or Ouadalupe Inclined shaft 184, 



16S, 167, 168 



New Prospect area 164.165 



New Prospect tunnels 166 



New Prospect workings 167 



Office Mine pit 165 



Old Inclined shaft 164. 167 



Old Mine 163. 164, JS8, Iff!, 169 



open pits 18f, 168 



submarginal quicksilver ore 171 



Thayer Labor 107,187,169,171 



Hacienda 137, 154. 186. 193, 195 



Hacienda furnace 158, 159 



Hacienda tunnel ISt,187 



Harry area 5,97, ISS. 173. 175 



Buzitailarea 133,134 



Harry dumps 134 



Harry ore body 138, 173 



Harry shaft ISS, 190 



Harry stone 132, 134, 173 



Harry tunnel 190 



Machine stope 113. 135 



Machine stope ore body 134 



history ISS 



location and extent of workings ISS 



West Harry stope 134 



Yellow Kid area ISS, 134 



Yellow Kid opencut 133 



Yellow Kid workings 104,108.134 



Harry James 188,190 



Harzburglte 52 



Herreshoff furnace IS9, 176, 18S 



Hllos, defined 110 



Set Veins, hllo. 



Hlnde, G. J., quoted 29 



Hornblende rocks 37. S9 



megascopic features 



microscopic feature* S9 



origin 44 



Hydrocarbons, tars and oils 95.96,10* 



Imlay, R. W., cited 



Indians, on Los Capitancillos Ridge 178 



Intrusive rocks, relation of quicksilver ore 



bodies... 1*4 



Juessen, Edmund 159. 19S 



Keen, Myra, fosslb Identified by 72,73 



Knox furnace 186 



KOpper, Klaus, quoted.. 25 



L*co Mining Co 164 



Land grants, New Almaden mine 180 



Landers, W. H 156, 158, 159, ISS 



Landslide mass of silica-carbonate breed* ISS, 



isr. 188. 171 



Landslides 6, 48, 49, 76,91.1 47 



Lava flows, mafic 1.30.SJ 



megascopic features 31 



microscopic feature* *' 



Lecse, J. P., quoted 177 



Lens, silica-carbonate rock 188 



Lenses, chert '** 



chromlte 1*S 



conglomerate 13 



of Franciscan group *> 



limestone of Eocene ate 70 



Lberrollte S2 



Limekiln fault.... 46,84,9* 



Page 



Limestone, Franciscan group 10.*J.126 



Franciscan group, fossils *-i 



insoluble residues W 



megascopic features tl 



oolitic, Franciscan group 5,*4.25 



lemws. Kocene 70 



Lincoln, President 176.JS* 



Llndgren, Waldemar, cited 123 



Location of area 3 



Lodochnikov, W. N., dted 51 



Lone Hill 74 



Los Capitandllos block 46. 8*, 86. 87. 91. 92. 93 



Los Capitancillos Ridge 6, 



23, 33, 46, 58, 73, 75, 79, 82, 85, 86, 87, 

 95, 128, 150, 184, 165. 189, J78. 

 Lyman, C. 8., cited 178 



M 



Melville, W. H., cited 97 



Metachert tf 



Metamorphic rocks 



origin 43 



Methods used in determining geologic struc- 

 tures - 



Methods used in mapping geologic features... 



Mexican miners - 177, 178, 179. 183 



Mine Hill ---- 21, 



23, 33, 34, 39, 42, 44, 47, 58, 79, 85, 95. 

 104, 107, 122, 128, 130, 146, 154, 170, 

 176, 178, 179. 188, 191. 



opencut -- 13S.J9.I 



Mineral springs, relation to quicksilver ore 



bodies 



Mineralizing agents, character. .. 122 



Mineralogy - - ** 



Minerals 



albite 35 ' 36 



associated with chert 



apophyllite .' w 



barite . ^ "" 



bornlte 96 ' M 



( . ;1 | rl t,. _ 96, JOJ 



chalcedony 27,96.10* 



chalcopyrite I**.* 8 



chromlte 



cinnabar 



74, 95, 98, 99, 101, 104, 110, 115, 130. 

 132, 133, 134, 136, 142, 143, 145, 146, 

 149, ISO, 151, 152, 154, 155, 158, 166, 

 J8, 173, 175. 177. 



' " 

 copper 



dolomite **** 



galena 96.9* 



gangue *** 



gyrollte 96, JM 



hydrocarbon 



In blocky serpentine 



In chert - 



In chlorite-lawsonlte boulder 



In gabbrolc rocks - 



in glacophane rocks 



in graywacke 



In greenstone K ' x 



In hornblende rocks 



In lava flows 



In limestone 



in metachert 



in nontachylltlc tufts 



in quartt-muscovlte schist* 



In sandstone of Eocene age, Santa Teresa 



HUls 



In shale* 



in sillea-carbonat* rocks ** 



inslltstone 



In tachylltlc tuffs 



In Temblor formation 



in tension fracture* 



In Upper Cretaceous rocks 



magnesite 50. 59, SO. 61, 100. 104 



