COAL  BETWEEN   GALLUP  AND   SAN    MATEO,    N.    MEX.  375 
by  J.  E.  Tiejen,  of  Bluewater,  N.  Mex.  The  location  of  this  prospect 
as  given  by  Mr.  Tiejen  is  in  the  center  of  sec.  30,  T.  15  N.,  R.  10  W. 
A  section  of  the  bed  follows: 
Section  of  coal  bed  at  Tiejen  prospect,  sec.  SO,  T.  15  N.,  R.  10  W.  {No.  11). 
Ft.  in. 
Shale,  carbonaceous 1 
Coal 1  3 
Shale,  arenaceous 1\ 
Coal 3  6 
Shale,  carbonaceous. 
Total  coal  bed 4       104; 
Schrader°  makes  the  following  statement  relative  to  this  coal: 
The  coal  is  a  good  black  lignite  &  and  contains  much  fossil  resin,  resembling  in  this 
respect  the  Monero  coal.  A  sample  was  taken  from  the  Tiejen  prospect  for  analysis. 
The  material  was  secured  by  making  a  cut  across  the  face  of  the  coal,  exclusive  of  the 
parting  1\  inches  in  thickness.  *  *  *  With  the  exception  of  the  heavy  percentage 
of  water,  this  analysis  compares  favorably  with  the  analyses  of  other  coals  of  the  field. 
The  analysis  of  this  coal  as  made  at  the  St.  Louis  laboratory  follows: 
Analysis  of  coal  from  the  Tiejen  bed. 
[F.  M.  Stanton,  chemist  in  charge.] 
Air-drying  loss 
Total  moisture,  including  air-drying  loss. 
Volatile  matter 
Fixed  carbon 
Ash 
Sulphur 
As  received.    Air  dried. 
5.20 
15.03 
10.37 
37.26 
39.30 
41.97 
44.27 
5.74 
6.06 
.57 
.60 
In  the  central  portion  of  T.  15  N.,  R.  10  W.,  shown  by  the  broken- 
lined  area  on  the  accompanying  map  (PL  XXIV),  the  Mancos  is 
barren  of  workable  coal  beds.  Thin  beds,  however,  occur  throughout 
the  length  of  the  Mancos  exposure.  From  this  vicinity  eastward  the 
workable  coals  are  confined  to  the  Mesaverde,  which  is  exposed  in  a 
bold,  well-marked  escarpment  striking  in  a  northwest-southeast 
direction. 
Locality  No.  12:  The  following  section  includes  the  workable  coal 
beds  of  the  escarpment  in  sec.  20,  T.  15  N.,  R.  10  W.: 
Section  of  Mesaverde  coal  beds  in  sec.  20,  T.  15  N,  R.  10  W.  {No.  12). 
Ft.      in. 
Sandstone  and  shale 40 
Shale,  brown,  hard 10 
Coal 3 
Shale,  brown 3 
Coal 1      8 
Shale 8 
o  Op.  cit.,  p.  254. 
b  The  term  "  subbituminous  "  was  later  adopted  by  the  Survey  for  this  class  of  coal. 
