170  CONTRIBUTIONS    TO   ECONOMIC    GEOUKiV,    I'HKi,   PART    I. 
The  ore  body  there  is  in  the  form  of  a  northward-pitching  anticlinal 
fold. 
Between  the  two  leads  shown  in  the  adit  and  the  eastern  vein  on 
the  summit  of  the  hill  there  is  another  lead  of  ore.  This  seems  to  con- 
ned with  the  easternmost  vein  exposed  in  the  adit  to  form  a  synclinal 
fold.  These  three  veins,  then,  are  presumably  the  same  bed,  which 
has  been  folded  and  eroded  so  as  to  give  the  appearance  of  three  sepa- 
rate beds.  The  westernmost  bed  on  Heacock  Mountain  has  been 
exposed  in  only  four  small  pits.  It  lies  about  25  paces  west  of  the  vein' 
shown  in  the  mouth  of  the  adit.  The  ore  is  identical  in  character 
with  that  seen  in  the  other  veins,  and  all  the  beds  may  represent  only 
one  ore  horizon  reduplicated  by  folding. 
In  connection  with  Heacock  Mountain  it  is  interesting  to  note  that 
the  direction  of  the  mountain  is  not  parallel  to  the  rock  structure,  but 
is  determined  mainly  by  the  direction  of  faults  on  the  sides  of  the 
mountain.  The  strata  run  more  nearly  north  and  south  than  the 
range,  which  trends  northeast-southwest,  and  therefore  the  veins, 
which  all  appear  on  the  western  side  of  the  mountain  in  the  northern 
part  of  t  his  property,  cross  i  he  range  and  in  the  more  southern  port  ion 
are  on  the  eastern  side. 
About  a  mile  south  of  the  Heacock  Mountain  openings,  on  the  east 
side  of  Weewoka  ('reek,  only  a  couple  of  hundred  paces  from  the  dam 
at  Weewokaville,  there  is  another  series  of  exposures  of  gray  ore. 
These  exposures  occur  on  a  small  ridge  that  is  separated  from  Hea- 
cock Mountain  by  faults  which  bring  down  the  dolomitic  limestone! 
so  that  a  valley  has  been  etched  on  them.  This  lower  ridge  because 
of  the  early  ownership  of  the  property  is  called  Riser  Mountain.  It 
has  a  heavy  quartzitic  sandstone  at  the  summit  and  a  series  of  some- 
what metamorphic  beds  on  the  lower  slopes.  These  beds,  however, 
arc  not  so  much  metamorphosed  as  the  slates  and  schists  at  the 
1  [eacock. 
The  ore  at  Riser  Mountain  is  rather  complexly  cut  by  both  normal 
and  reverse  faults.  These  have,  however,  not  materially  affected  the 
quality  of  the  ore,  which  is  of  somewhat  lower  grade  than  thai  at  the 
Heacock  Mountain  property.  The  most  marked  effect  of  the  faulting 
has  been  to  increase  materially  the  thickness  of  the  outcrop.  Conse- 
quently for  a  distance  of  500  feet  along  the  vein  it  is  wide  enough  to 
afford  good  opportunity  for  stripping.  The  ore  at  this  place  shows 
rather  more  intimate  connection  with  the  quartzitic  sandstone  than 
at  most  other  localities.  The  sandstone  is  rather  coarse  and  in  a 
number  of  places  shows  well-marked  cross-bedding  on  a  small  scale. 
The  ore  here  occurs  in  two  leads,  but  owing  to  the  slight  amount  of 
development  it  is  uncertain  whether  they  are  connected  or  not.  From 
the  rapid  thickening  and  thinning  of  the  main  lead  it  is  possible  that 
the  thick  places  represent  the  fold  where  the  two  seams  coalesce.     On 
