348  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,   1903.  [bull.  225. 
district,  on  Gray  Bull  River;  the  Thermopolis  district,  on  Bighorn 
River;  the  Basin  area,  on  Bighorn  River,  near  the  mouth  of  No  Wood 
Creek;  and  the  newly  opened  Garland  district,  near  Garland,  Wyo. 
Cody  district. — This  district  embraces  an  area  of  5  to  20  miles,  with 
its  greater  dimension  extending  along  the  strike  of  the  formation, 
from  Heart  Mountain  southward  to  a  point  on  Sage  Creek  12  miles 
above  its  mouth.  The  dips  are  generally  steep,  ranging  from  30°  to 
50°.  Operations  in  this  district  are  confined  to  two  localities.  The 
larger,  known  as  the  Burns  &  Roger  mine,  is  situated  5  miles  south- 
southeast  of  Cody,  on  the  west  rim  of  a  shallow  syncline  through 
which  Sage  Creek  flows.  Coal  occurs  here  in  the  lower  sandstone 
division,  100  feet  from  the  base  of  the  formation.  The  deposit  con- 
sists of  three  benches,  separated  by  two  shale  partings.  It  has  an 
eastward  dip  of  47°,  and  is  included  in  beds  of  massive  gray  sand- 
stone. An  incline  90  feet  long  has  been  driven  on  the  seam,  with  a 
large  room  on  either  side.  The  coal  is  hard  and  black,  with  a  bright 
luster  and  uneven  fracture.  It  does  not  yield  readily  to  atmospheric 
agencies,  and  as  a  domestic  coal  is  said  to  afford  considerable  satisfac- 
tion. The  product  of  this  mine  will  probably  never  be  large,  for  the 
bed  is  thin  and  the  pitch  so  steep  that  the  limit  of  economic  working 
will  soon  be  reached.  This  mine  furnishes  a  part  of  the  fuel  supply 
for  the  residents  of  Cody  and  the  Shoshone  River  Valley.  The 
Nevins  mine,  3i  miles  northeast  of  Cody,  on  the  opposite  side  of 
Shoshone  River,  produces  a  small  amount  of  coal  from  a  2-foot  bed 
in  the  middle  shaty  division.  The  product  is  a  good  lignitic  variety, 
but  weathers  easily.  The  following  section  was  measured  at  the 
Burns  &  Roger  mine: 
Section  at  Burns  &  Roger  mine,  near  Cody,  Wyo. 
Ft.  In. 
Coal : 0  10 
Bony  coal 0  6 
Coal 1  2 
Gray  slate 0  3 
Coal 1  0 
Considerable  prospecting  has  been  done  on  Sage  Creek  and  its  trib- 
utaries, in  the  vicinity  of  the  Frost  ranch.  The  principal  openings 
are  known  as  the  Frost  mine  and  the  Mondell  property.  The  former 
has  been  worked  to  some  extent,  but  at  present  is  abandoned. .  The 
analysis  of  the  coal  in  the  Mondell  opening  is  given  on  page  362.  It 
contains  a  small  per  cent  of  ash,  but  the  remaining  constituents  show 
little  variation  from  those  of  the  average  sample  collected  along  the 
west  edge  of  the  Bighorn  Basin. 
Meeteetse  district. — This,  the  largest  coal  area  in  the  Bighorn  Basin, 
comprises  several  well-developed  mines  located  around  the  town  of 
