CONTENTS, Vv 
Analyses of igneous and crystalline rocks—Continued. 
Utah—Continued. Page 
3. Bingham district..........0.00 00.0020 cece eee e eee cece eceeees 120 
4, La Sal Mountaina., <. 2ccccesecese ves ooodnscxeeueenewedeersesss 120 
5. Park City district: cscccwecncie: $2 cere bass aereamageocdew eecde ss 121 
6. Miscellaneous rocks...........002.0000 000000 ee cee cece cence eee eee 122 
INGW MExicoLicst cores eo eee wien tciy you cane oun ele tae 122 
1. Basalts from the Rio Grande Canyon..............-.....--2--2-- 123 
2, Mount Taylor region... 2... . 2 40sec eserscneeescumcaeass sess 123 
3: Colfax COUN ss sismacnewsteake side sea eopraonbecwese dees es 123 
4. Miscellaneous rocks....:.........2-02000 2002020202 e eee e eee ee 124 
IANO tate pepe Ne Nha ci pe tncypaistaseds ee veces naro eae eRe My deh ea cones 125 
T.-Globe.district.2 onan osccmueuuys ceo 2eess454 apeieoceiee eave cece 125 
2. Bradshaw Mountains quadrangle.......-.......-.----+---2------ 126 
3. Morenel district. osccuics o2ee see ees soos sueuiawesemaae ease sacs 127 
4. Miscellaneous rocks..........-.2--2-0-222-2022 22222 e cece ee eeee 127 
IN OWA Gel nes as SC apy anette dhe oe ato hse aM ice cane ee inane 129 
1. Tonopah district:4:secceacusiens i22 denna neenere eet Sok aeee's 129 
2. Goldtield Gisttict covesecte ge sea pace anasosanannted se. 4 paces 130 
3x, Bullirog distri Ct: o3.ce. deisine sige cere asa eee anys Saks ees 132 
4, Miscellaneois rocks edewn ue 22s 34s esansneeeeucenes axes hee kae 132 
Californian. at's vss 2s. sez ees Seas cee een eas ec eh ee 135 
1. Mount Shasta.............2.-- 2 ad wisi epusapbaieddeuonte eae So oe ee la 135 
2. Lassen, Peak repiotiec cs sssues oes see cqisyedenssnuaecaeecdaeceds 138 
Rhyolitesesj3:,0.0 Secese'es tes sae eeeeeadeededae sess esaees = 138 
Dacites and andesites. ............--.--2 20-2200 e eee eee eee 139 
Basalts). conte lspci So5e 5 esd moo eees eke aaesteched ea 142 
3.. Plumas COUnt yi: ootconecvesss5.. 4 abRneEed ee aeSeeeandesee eH 144 
4, Butte COUMtY sce ccccus ves eens en oereeeacnumse soba ee eosin 146 
Oy Sietta: Coun tyos: cecwsieie 2 yoke eer eestoceakee hehe a wes eas 147 
6. Nevada City and Grass Valley...............-......-2-0-2-2+--- 149 
T~ Placer County « .2scsecee2ss cses2 eae eeesevsdeceueaeseseseses eee 150 
8,. Eldorado County ans eseve 22 ee s2csesaaeekee ee ses yer ck ete 152 
9. Amad Of COUnY jjceciiarrs 5: 234i hacia eeamae bee Sad oeed eaten 152 
10. Calaveras County..... eee tsa teens Seen ead IAT AAAS 154 
11, TioluMNeCOunty on wads co ess oye ooetedeleedeaces thd bk eaaawes 154 
12,, Mariposa OOUntY -.sicccec. ss ec cee wane smenesecase eevee sed eecies 157 
13. The quicksilver région. . «=. 0.04 «deswewwsmcsaeac cece se es wersieets 160 
14. Molint Diablos ospcienwee es oes e sas oad side ste bine aces occas x eteoe 161 
15.. Miscellaneous rocks....2..+ +++. + ++ 2<s:eseeedseee ee eeesseseeeenxe 163 
OPEROT sa aaiiens ta aatqaascualaes Papasan cece ntasaeens hae eho 166 
1. Basalt, Mount Thielsen......... ta tatestatahs fase Reena ez sriars Se ye ae 166 
2, Riddlesqtiadtanglniccccesess seeatnenqeese Ainge es sare samara 166 
3; Crater Lake sic. 2 ssinciesweeccns veeseacawenens Laesemie nese ee Oeyae 168 
4. Port Orford quadrangles. isjos60. 02s negisies sce sein. ves cess e/a 169 
5. Miscellaneous rocks se cae cee ec cern sseeecedece yess sees wee genic 171 
Washington: eso pce esiceseccceeeeus esd a3 eemeeereeeee tess e225 56 24a 172 
1. Mount Stuart quadrangle.................-.2..-22.-2-2202000-0-- 172 
2. Snoqualmie quadrangle ............-..-.--2-.--+--22-2202-2 2 +e 173 
3. Miscellaneous rocks......-....0..02 0.002 e eee eee cence eee eee 174 
Ailaighe sip: ain oresie ene 2 o's alee hemtiesteyetne see's see roan eet as sean cameras 174 
1: Douglas Island sccccanccuceeces seca Seapadtsspess oress 2 esodede 174 
2. Copper River Basins: ses.csscs cesses: santexsteetee secs sseeness 175 
3. Miscellaneous rocks..........---- 2-22-2222 eee eee eee eee eee eee 176 
