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<br />3.1. L1/UI~UCl'
<br />~1 I,c 1Zcllry 'l~rust lvline is irr [lie rrcrr(lr~.vcs( currrcr u( the 511 Juatr Vulcani
<br />Ju~rr Vt,lcr„ric I~ielrJ is arr areally ex(etlsivc bile u( irlierr,leuia(e to (elsic rucl,I ie1cJ. ~17re ;
<br />several !,,roc ca:clera c_rr„r!>lexes. Veir; eJe),vsi(s iri (Ire Sar; Juan t4lcrurr(~ilrs lraver);(tcd (n
<br />sig,ri(ic;trit rluarrii(ies v(gc.lld, silver arrcJ li~sc ntelal s. Si,;cr` 18%4, over 37UU n ~ . ~ ucJuc
<br />~uc(icrrr, irrclurJir;r~ itius(l • silver turd ~nl illlrc,'i rtt 1>;
<br />° y b rl, Il~ve been ,lr , ~ i~,,
<br />S., r, Ju~rr, T`vlc>cr„(;,i„s ! 5srca.,J cxir~clec) (rurr, (lie ~'~~este
<br />` ll,rc,crkl, 1 y7~. ~I Ile ~7OO ,,,illicr„ ciiccl :.Irc,vc is I,.,sccl cr,r L;rricl l,r i,u<u
<br />:,( lt).(i .l lu :Z5 c(c,il;,r : lrcr rr,c„c:c.
<br />/~ ZCcc,ic,bic ,,,,;1~ wi111 a crcr::~ scclic,r, 1hrc,u
<br />vicilli(~ ~ bl, ll,c . ,ic :Ire:, is 1,rescr,Iccl i„ 1~i
<br />c,(l!ic I?ulry'l~rus! Mirrc, vcrlrr,ilc r(,Ck.5:11C 1,J I(ICl)l,,ily rlryrr~laci(ic (Ic>SVIl~-3-1,. J,r tl
<br />c.lci(ic :r E~);lurrrcr:~ics ,urcl cl ccu~ts, a
<br />u.Iriz I.I(ri,c; •,~.•clucc! (u((s. ~l fie rucks ~,rc ~rccrrisl, ~;r,y uuc to
<br />l,elv,rsivc 1>rvl,ylitic:Illcr;l(iurr wlricli cievclul,ctl clilt,ritc a+IJ cl,iclc~lc. ~\'it.llin ~~
<br />c,( ilrc irr:ire )rc>r(,,I ,, lt,r~c ~aLrL~ru (u ~r:rr!uciiurtic lrlulurr (unlr s tl,c Stur; l(1O (`ct »c
<br />I~~cally, clri!rlaccr„erlt v((I,c Scully tvluuir(~~iii Suck causccJ l,c;~v„ y 1~3uurlt,,i,l Stuc
<br />ics. (`)u„rcrcrus rJil:cs aucl vci„~; ratJirltc cr~.,((ru ~ 1 (r~cturil,)~ u(tlre vulcar
<br />(lrc Slur?~• Mt>t,u(~rici Stuc~;.w,is c.lr,l>l,rcr_;J I~(crlirr ~(rlec ~cvcl~~,nlcri(ru( (luck. Clrrc,ucrlcr~icall:
<br />1-ie!cJ, r t ,c S.,n Ju~rrr ~~ulcani
<br />~l~lic IZuI,}' 1 I~USI ~'11IIC I$ IUC~iC~I Irl t1 r1 ar ca ~r,i!ccJ Ilic ~Jrictrrtil,~llibre C~IIcJcrtl cr(
<br />1vSvuri(:tiir Range. ~17ie ~eulubic )rrslury u( (Ire Uricurir)r<tlr~re Calcler,r ~rrcu I,c~lrr SariJu~.tr
<br />tn~(ely 3S rr(illicrrt years a~u ~ti-i(li (lre (urtri<t(iu!, .. o I <il,!,rc~xi
<br />curly dc(ivi(y 1~rutluce~ iu(erla erect I~IVa It„,, tr(sc;l((ereel a!re)esi(res(rti(u-vc,)c;irrt,cs.~!lri:
<br />Y ( rs, Irrccct;i (T,o;,~~ ~.~~ anu vulc~rnic scditrrcnl°
<br />~~•llic)r cv~fesced around t]re cures u((lrese v~,lc:,luues. ~!rlrruxilrr,rtel 23 ,milli ,
<br />iri tlrc Sari Juarr ,~'iuunlains, lire c!r,iracier office vtrlc.,rric aclivi(y y crrr yc,irs Abu,
<br />u(lesser (lu«•s Lrrd tuffs cr(~ („5;~1(-rl~yulite ruck. '1-Iris assenllrl,,l c)cir<(t;bed wi(II (lre erulrliurr
<br />u„lil ~1>uul S rrrilliul, c~,s b ulctrnic rucks (urnrccl
<br />y ~ • bu. In ~tluitiul,, silicic,us i~,iccrrrs in(ru.;iuns ~~•crc crrrlrlaced
<br />illrvu~(luut the San Ju;in It'fuuntain lt~li- e uti~e ~,
<br />-rbr} ~ r ~ (i.nc slrarr (rut,l <rl,uuf 2~, (c, I O li,illiuc.~~c,.,rs
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