DURANGO-GALLUP    COAL    FIELD,    COLORADO-NEW    MEXICO.        249 
iormation,  and  the  hogback  formed  by  its  hard  beds  constitutes  the  continental  divide  as 
At  Monero.  From  the  summit  of*  this  hogback  the  dip  is  gently  westward  and  the  rocks 
jjbass  by  low  dips  under  the  San  Juan  basin  to  the  west.  The  beds  are  well  exposed  near 
Ihe  northeast  shore  of  Boulder  Lake  and  the  Elvado  Railway.  In  general  little  is  known 
■regarding  the  coal  of  this  district,  but  it  shows  in  places  in  natural  exposures,  as  indicated 
jby  the  following  section,  which  was  measured  near  Boulder  Lake: 
flection  of  coal  bed  near  the  railroad,  one-fourth,  mile  northeast  of  Boulder  Lake,  New  Mexico, 
in  sec.  18,  T.  29  N.,R.  1  W. 
Ft.  In. 
Sandstone 2 
Shale,  coaly  at  base I  •_> 
Coal  (good  quality) 2  3 
Sandstone,  argillaceous ...  3 
Coal  (good  quality) 2  1 
Shale. 
I  At  Stinking  Lake  the  coal  outcrops  at  intervals  along  the  east  shore,  which  is  several 
[(miles  in  extent.  Although  it  is  easily  accessible  and  the  beds  aggregate  10  feet  in  thick- 
ness, the  coal  is  so  broken  by  partings  as  to  be  of  little  value.     The  section  is  as  follows: 
Section  of  coal  bed  on  the  east  shore  of  Stinking  Lake,  New  Mexico,  in  sec.  20,  T.  28  N., 
R.  1  W 
Ft.  In. 
Shale  with  thin  sandstone 60 
Coal 4 
Shale,  black 2 
Coal I       s 
Shale,  black 4 
Coal '. 1      3 
Shale,  black 3 
Coal 1 
Shale,  black 3.r> 
Shale,  arenaceous 3 
Sandstone 1 
Shale,  arenaceous 15 
Sandstone,  argillaceous 10 
Shale,  black 18 
Sandstone 2 
Coal 1 
Shale 1      6 
Sandstone 4 
Shale,  black 2      6 
Coal 1      8 
Shale 1      2 
Sandstone,  ferruginous 8 
Shale 2 
Coal 1 
Shale . ." 10 
Coal 10 
Shale .- 2 
Coal 1      3 
Shale 2 
Sandstone 20 
195      1 
GALLINA    DISTRICT. 
The  Gallina  district  lies  south  of  the  one  last  described,  and  extends  from  12  miles  north 
of  Gallina  to  the  divide  between  Gallina  and  Puerco  rivers,  a  distance  of  15  miles,  and  flanks 
Gallina  Mountain  on  the  west.  No  mining  has  been  done  in  the  district,  but  the  coal 
appears  to  be  of  good  quality  and  is  workable,  and  with  the  installation  of  transportation 
facilities-may. become  an  important  factor  in  the  fuel  supply  of  the  Southwest. 
