COAL  ON   NORTHEAST  SIDE   OF  BIGHORN   BASIN,   WYO.  173 
About  225  yards  northwest  of  this  opening  is  a  prospect  with  30 
inches  of  bright,  clean  coal,  containing  2  to  4  inches  of  bony  coal 
which  is  dull  black  and  includes  small,  lenticular  clay  concretions. 
There  are  three  coal  beds  present  in  these  shales  at  most  localities. 
The  lower  bed  is  in  all  exposures  the  best  of  the  three,  and  usually  it 
is  the  only  one  that  is  workable.  A  section  of  this  bed  in  the  Cox 
prospect  on  Sand  Creek  is  given  below. 
Section  of  coal  bed  on  Sand  Creek,  2\  miles  south  of  Jordan  mill,  in  sec.  10,  T.  49  N., 
R.  92  W. 
Sandstone?  Ft.    in. 
Coal : 11 
Bone 1 
Coal 4 
Clay 5 
Coal... 4 
Clay..! 2 
Coal 1    8 
Clay * 
Coal 8 
Shale,  carbonaceous. 
Total  coal 3  11 
Farther  south  the  bed  deteriorates,  and  in  the  SW.  \  NE.  \  sec.  14, 
T.  49  N.,  R.  92  W.,  the  lower  bed  contains  only  1  foot  4  inches  of  coal. 
It  is  not  workable  south  of  this  point.  On  the  north  bank  of  No 
Wood  Creek  the  middle  bed  is  only  23  inches  thick  and  is  not  work- 
able. As  shown  by  the  map,  the  outcrop  of  the  Laramie  coal  follows 
a  devious,  S-shaped  course  through  T.  50  N.,  E.  92  W.,  where  it  is 
involved  in  an  anticlinal  and  a  synclinal  fold.  The  exposures  are 
poor  in  this  township,  and  it  is  uncertain  whether  or  not  the  coal 
reaches  workable  thickness. 
In  section  12  of  the  next  township  west  the  coal  is  well  exposed  in 
an  old  prospect,  where  the  following  section  was  obtained: 
Section  of  coal  bed  5  miles  southeast  of  Basin,  in  sec.  12,  T.  50   \ '..  R.  '■'■■  H 
Ft.    in. 
Coal 8 
Shale L5 
Coal 1    3 
Coal,  bony 
Shale,  carbonaceous. 
North  of  this  point  the  coal  is  not  workable.  On  the  south  bank 
of  No  Wood  Creek,  in  sec  33;  T.  50  X.,  K.  92  \\\.  the  following  sec- 
tion was  obtained : 
