160         CONTRIBUTIONS    TO    ECONOMIC   GEOLOGY,   1907,    PART   II. 
Ft.    in. 
Fire  clay 6 
Shale,  gray 1 
Shale,  brown 6 
Coal 5 
Fire  clay 1 
Shale,  gray 12     1 
Coal 5 
Fire  clay 3 
Shale,  light  colored , 11     6 
Coal 8 
Fire  clay  and  black  shale 6 
Shale,  gray 2 
Shale,  brown 3 
Shale,  sandy 5    6 
Sandstone,  soft 82  11 
652    4§ 
The  next  coal  zone  above  the  Glenrock-Big  Muddy  is  about  2,500 
feet  above  the  base  of  the  Fort  Union  (?)  formation.  It  is  about  1,000 
feet  thick,  and  will  be  called  the  Douglas-Inez  coal  zone,  because 
Douglas  and  Inez  are  the  most  important  places  where  the  beds  are 
worked.  It  outcrops  in  a  broad  belt  running  from  a  point  near  the 
southeast  corner  of  the  field  to  the  north  side  of  T.  36  N.,  R.  76  W. 
Near  Inez  there  are  two  beds  of  coal,  each  more  than  5  feet  thick, 
and  the  property  would  seem  to  be  the  most  valuable  in  the  area; 
but  the  company  which  undertook  to  work  them  did  not  make  a 
success.  The  reasons  assigned  were  that  (1)  the  roof  and  floor  are 
very  poor,  (2)  there  was  much  water,  and  (3)  the  coal  is  not  of 
very  good  quality.  There  were  three  mines  on  the  two  beds  only  a 
short  distance  from  the  railroad,  and  the  coal  was  worked  out  for 
several  hundred  feet  down  the  dip.  A  railroad  spur  was  built  out 
to  the  mines,  but  mining  was  abandoned  some  years  ago  and  the 
track  has  been  removed. 
There  are  several  thinner  beds  of  coal  near  the  two  above  men- 
tioned, but  elsewhere  in  the  field  there  are  not  so  many  beds  in  this 
zone.     The  following  is  a  section  near  Inez: 
Section  of  Douglas-Inez  coal  zone  2  miles  southwest  of  Inez. 
Ft.     in. 
Sandstone,  brown,  very  resistant 3 
Shale,  alternating  dark  and  light 240 
Shale,  sandy,  yellowish  white 15 
Sandstone,  hard,  dark  brown,  concretionary 4-10 
Shale,  bluish,  light  to  dark 12 
Coal  (leaves  in  roof) 3 
Sandstone,  massive,  white,  soft 4 
Shale,  dark,  carbonaceous,  traces  of  coal 4 
Sandstone,  massive,  white,  rather  soft 18 
Coal 2  11 
