48  CONTRIBUTIONS   TO   ECONOMIC    GEOLOGY,  1907,   PART   II. 
is  in  such  condition  that  a  section  can  be  measured.     The  character 
of  the  bed  here  is  shown  by  the  following  sections: 
Section  of  Kircher  coal  bed  on  Lignite  Creek  at  county-road  crossing,  three-fourths  mile 
south  of  Northern  Pacific  Railway,  on  Fort  Keogh  Military  Reservation. 
Ft.      in. 
Coal 1    9 
Clay 1 
Coal 1     6J 
Clay 4 
Coal 9i 
Clay 2 
Coal 9 
Total  coal 4     9| 
Section  of  Kircher  coal  bed  at  head  of  Keogh  Flat. 
Ft.    in. 
Coal 1     2 
Clay : •  G 
Coal 3     4 
Total  coal 4     (i 
Eastward  from  the  head  of  Keogh  Flat  the  outcrop  of  this  bed 
follows  the  base  of  the  hills  to  Tongue  River,  where  it  turns  south- 
ward and  follows  up  the  west  bank  of  the  river  for  6  or  7  miles. 
The  coal  shows  a  workable  thickness  at  only  one  point  in  this  stretch, 
viz,  at  what  is  called  the  Weaver  mine,  on  the  west  bank  of  Tongue 
River,  5  miles  south  of  Miles  City,  where  it  is  4  feet  4  inches  thick, 
without  partings,  and  has  been  opened  by  a  number  of  short,  tem- 
porary drifts,  the  product  being  hauled  to  Miles  City  in  wagons. 
East  of  Tongue  River  the  outcrop  of  this  bed  follows  the  base  of  the 
hills  and  practically  coincides  with  the  margin  of  the  lowlands  or 
river  flat,  but  for  several  miles  there  is  no  evidence  that  the  bed 
contains  workable  coal.  It  is  of  better  quality,  however,  a  short  dis- 
tance east  of  Miles  City,  and  has  been  exploited  by  a  number  of 
small  mines,  only  one  of  which  is  active  at  the  present  time.  At 
the  Kircher  mine,  in  the  SE.  \  sec.  19,  T.  8  N.,  R.  48  E.,  the  bed  is 
60  feet  below  the  surface  and  is  reached  by  an  incline.  It  averages 
5  feet  thick  and  has  a  2-inch  parting  described  as  "grit"  near  the 
center.  The  floor  is  hard  clay,  which  heaves  when  wet.  The  roof 
is  also  hard  clay,  and  8  inches  to  afoot  of  coal  is  usually  left  to  support 
it.     A  section  measured  here  is  as  follows: 
Section  of  coal  bed  at  the  Kircher  mine,  in  sec.  19,  T.  8  N.,  R.  48  E. 
Ft.   in. 
Coal 1 
Shale G 
Coal 4 
Shale 2 
Coal 2    6 
Bone 1 
Coal 2    6 
Total  coal,.-.. 6    4 
