COAL   BETWEEN   GALLUP   AND   SAN    MATEO,    N.    MEX.  367 
previously  cited.  The  present  lack  of  demand  for  subbituminous 
noncoking  coals  in  this  portion  of  the  country  and  the  recent 
adoption  of  fuel  oil  on  the  Pacific  coast  railroads  has  had  a  tendency 
to  prevent  any  marked  increase  in  production  in  this  part  of  the 
field.  The  sections  given  in  the  following  pages  show  the  number 
of  workable  coal  beds  in  the  escarpment  between  Gallup  and  San 
Mateo. 
Locality  No.  1 : a  The  following  section  represents  the  coal-bearing 
strata,  beginning  at  the  base  of  the  Mancos  transitional  rocks  in  the 
central  part  of  sec.  16,  T.  16  N.,  R.  17  W.,  and  extending  to  the  top 
of  the  Mesaverde  escarpment,  at  the  southeast  corner  of  sec.  6  of  the 
same  township: 
Section  of  coal-bearing  rocks  from  sec.  16  to  sec.  6,  T.  16  N.,  R.  17  W.  (No.  1). 
Ft.      in. 
Sandstone,  brown,  massive 30 
Shale  and  shaly  sandstone 40 
Sandstone,  massive 6 
Shale,  carbonaceous 2 
Coal 3 
Shale,  carbonaceous 3 
Coal 6 
Shale,  carbonaceous 6 
Coal 2      2 
Shale,  carbonaceous 10 
Shale,  drab 5 
Coal 6 
Shale,  carbonaceous 2 
Shale  and  thin  sandstone 15 
Coal 6 
Shale 25 
Sandstone 3 
Shale,  drab 5 
Shale,  carbonaceous 20 
Shale  and  thin  brownish  sandstone 150 
Sandstone,  gray,  massive 50 
Shale,  carbonaceous 10 
Sandstone  and  shale 40 
Sandstone,  brown,  massive 35 
Shale 20 
Sandstone,  massive 20 
Shale  and  sandstone 50 
Shale 5 
Coal 1      8 
Shale 10 
Sandstone 1 
Shale,  carbonaceous 1 
Sandstone,  gray 10 
Coal 2 
Shale  and  sandstone 15 
a  These  numbers  correspond  to  those  on  PI.  XXIV. 
