[ESS    AND 
GRATON 
*D]  OCCURRENCE    AND    DISTRIBUTION    OF    TIN.  165 
opaz,  has  been  found  near  Glancy.  Stream  tin  has  also  boon  found 
it  Prickly  Pear  Creek,  French  Bar,  at  the  head  of  Tenmile  Creek. 
n  the  "  basin,"  in  Basin  Gulch,  and  in  Peterson  Creek. 
Idaho. — Tin  oxide  is  occasionally  found  in  streams  which  have 
heir  source  in  the  Bitterroot  Range  in  Idaho.  Jordan  Creek  is  one 
)f  the  localities  known  for  many  years.  The  mineral  has  also  been 
:ound  in  the  Coour  d'Alene  district. 
Colorado. — Tin  ore  has  been  reported  from  Jefferson  County,  near 
Tolden. 
Texas. — Cassiterite  has  been  found  near  Barringer  Hill,  in  Llano 
bounty,  and  about  Herman  and  Willow  crooks  in  Mason  County. 
A  more  important  deposit  has  been  described  as  occurring  about  10 
riiles  north  of  the  city  of  El  Paso.  The  granite  core  of  the  Frank- 
in  Mountains  is  here  cut  by  a  number  of  quartz  veins  carrying  cas- 
iterite  and  wolframite,  and  in  places  pyrite,  The  granite  is  much 
iltered  near  the  veins,  and  holds  cassiterite  and  a  little  tourmaline. 
Home  development  work  has  been  done,  but  the  present  conditions  are 
lot  known. 
California. — Tin  has  been  found  in  small  quantities,  or  has  been 
eported  from  a  number  of  widely  separated  localities  in  California. 
In  Hungary  Creek,  a  tributary  of  the  Klamath  River,  in  Siskiyou 
ounty,  the  occurrence  of  float  tin  has  boon  reported. 
Small  pieces  of  stream  tin  have  been  found  near  Weaverville,  in- 
finity County,  and  in  the  middle  fork  of  Feather  River,  near  Big 
ar,  in  Plumas  County. 
A  5-foot  vein  carrying  tin  has  been  reported  to  occur  near  the 
[okelumne  River  in  Amador  County.' 
In  washing  for  gold  on  the  White  Lead  gravel  claim,  in  Tuol- 
nne   County,   it   is   stated   that   native   crystalline   tin   was   found 
final  pannings  from  the  boxes. 
In  the  Temescal  Mountains,  in  San  Bernardino  County,  is  the  only 
Lportant  occurrence  of  tin  ore  in  the  State.  Metamorphosed  sedi- 
mts  are  there  cut  by  a  large  mass  of  coarse-grained  granite.  Small 
Ikes  of  fine-grained  siliceous  granite  cut  the  coarser  jock.  A  por- 
ftyritic  intrusive  also  invades  the  metamorphic  rocks.  A  system  of 
fjsuros  containing  quartz  and  tourmaline  cuts  these  intrusive  rocks. 
I  but  one  of  these  veins,  that  which  crosses  Cajalco  Hill,  has  cassit- 
ite  been  found.  It  is  distributed  through  portions  of  the  vein  or 
gthered  in  bunches  or  stringers.  The  irregular  walls  of  the  ore  body 
ajd  the  character  of  the  vein  filling  make  it  probable  that  the  veins 
a^  due  to  replacement  of  the  granite  along  originally  narrow  fissures. 
Cpper  and  arsenopyrite  have  been  found  with  the  tin. 
Tin  was  discovered  at  this  locality  in  1853.  In  the  eighties  con- 
sijerable  work  was  done,  and  a  small  amount  of  ore  was  mined  and 
sljpped.     It  is  said  that  the  rock  sent  to  the  mill  contained  in  the 
