DIIRANGOGALLUP    COAL    FIELD,    COLORADO-NEW    MEXICO.        245 
Section  of  coal  bed  at  the  Perkins  d>  Rockwood  mine,  7\  mites  northeast  of  Durango,  <'<>/<>. 
Name  of  coal  bed. 
Section. 
Thickness. 
[Coal,  dirty 
Ft.  in. 
5 
2      4$ 
/•'/.  in. 
) 
No.  2 
|CoaJ 
2  n 
Sandstone,  white 
I 
72    0 
Coal 
1  3 
8 
2  9 
3 
10 
Sandstone 
5    9 
No.  3  ( Porter) 
Shale 
Coal 
Sandstone 
22     0 
[Coal,  variable  (not  mined). 
3     0± 
2     10 
Fire  clay. 
In  early  days  this  coal  was  coked  and  the  product  was  hauled  to  Durango  for  smelting 
purposes.  Coal  of  a  similar  quality  and  thickness  is  reported  to  occur  in  the  Mesaverde 
formation  near  Pagosa  Springs,  on  Rio  Nutria,  but  between  Florida  River  and  the  Monero 
district  no  workable  coal  was  observed  in  this  formation. 
The  Laramie  (?)  coal  group  is  much  more  extensively  distributed,  exposed,  and  worked 
in  this  district  than  the  Mesaverde,  and  it  usually  includes  two  or  more  beds.  Slopes  have 
been  driven  in  on  one  of  these  beds  near  Florida  River,  about  1  mile  south  of  the  Perkins 
&  Rockwood  mine,  and  the  following  section  is  exposed: 
Section  of  coal  bed  at  old  mines  7h  miles  .northeast  of  Durango,  Colo. 
Ft.  In. 
Sandstone. 
Coal  a 3 
Shale 8 
Coal  a > 4 
Sandstone. 
East  of  this  point  the  coal  beds  of  this  group  make  only  a  slight  showing  for  a  number  of 
miles.  Owing  to  the  scarcity  of  exposures,  it  is  difficult  to  determine  their  exact  condition, 
but  they  are  probably  of  workable  thickness.  An  opening  on  the  head  of  Texas  Creek,  9 
miles  northwest  of  Bayfield,  shows  the  following  section: 
Section  of  coal  bed  in  Carleton's  coal  mine,  9  miles  northwest  of  Bay field,  Colo. 
Ft.  In. 
Black  shale  and  bony  coal. 
Coal 1  2 
Shale 1  8 
Coal 8 
Shale 8 
Coal 1  2 
Bony  coal. 
«The  quality  of  this  coal  is  unknown,  but  according  to  report  it  has  been  tested  anil  found  to  be 
"semicoking." 
