234  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,  190.f 
Williams  Fork.  These  workings  arc  known  as  the  Green  and  the  Scott  mines.  The  Scott 
mine  exposes  a  scam  of  9  feet  2  inches  of  good  coal,  overlain  by  4  feet  of  shale.  This  was 
worked  out  in  a  large  chamber,  the  roof  of  which  was  in  a  dangerous  condition  when  visited. 
The  Green  seam  (Q)  was  opened  by  an  entry  ending  in  a  chamber  and  exposes  a  line  face.' 
of  coal  10  feci  thick.  A  sample  from  the  Green  seam,  representative  of  the  whole  face  as 
mined,  shows  the  following  analysis: 
Analysis  of  coal  (Sample  Q)  from,  the  Green  seam,  Hayden  Gulch. 
[F.  M.  Stanton,  analyst.] 
Moisture 11.34 
Volatile  matter 154. 4!) 
Fixed  carbon 49.r>7 
A.SD 4.  60 
ion. (in 
Sulphur 50 
Loss  nf  moisture  on  air  drying 3.40 
From  Hayden  Gulch  the  outcrops  of  the  lower  and  middle  coal  groups  extend  westward 
on  the  south  slope  of  Williams  Fork  divide.  The  coals  have  been  prospected  at  many 
points  along  this  belt,  but  nowhere  have  they  been  opened  to  any  considerable  extent. 
These  outcrops  probably  represenl  a  large  quantity  of  workable  coal,  having  a  very  uniform 
light  dip  to  the  north.  The  outcrops  are  accessible  in  many  gulches  that  extend  back  from 
Williams  Fork. 
In  the  vicinity  of  Hamilton  post-office,  on  the  south  side  of  the  river,  some  coals  are; 
exposed  thai  are  thought  to  belong  to  the  lower  group.  These  appear  to  be  small  outlying 
basins,  a  portion  of  the  complication  of  folds  lying  between  Williams  Fork  and  Axial  Basin. 
The  Kellog  coal  bank,  5  miles  south  and  a  little  fast  of  Hamilton,  was  visited,  as  were 
a  bo  a  number  of  prospects  on  thick  seams  m  the  same  locality.  The  opening  on  the  Kellog 
bank   i-  a   drift   200  feet    in  and  shows   15  feel    of  solid  coal,  with  coal  roof  and  coal  floor. 
Lower  )'hiuj><i  district.  Near  the  junction  of  Williams  Fork  and  Yampa  River  a  huge 
number  of  prospect  pi  is  and  drifts  and  se\  era  I  banks  to  supply  the  local  demand  have  been 
opened.  These  are  on  seam-  of  all  three  coal  groups.  Among  these  a  number  of  prospect 
drifts,  locally  known  as  the  Greeley  group,  have  been  opened  in  the  canyon  of  Yampa 
River.  The  openings  on  this  property  were  in  bad  condition,  owing  to  caving,  but  exposed 
a  number  of  thick  seams  of  coal,  representative  of  the  lower  coal  group  at  this  poind 
Approximate  measurements  sho\t  one  seam  of  5  feet  8  inches  of  solid  coal,  another  of  7 
feet  of  coal  with  a  6-inch  bony  parting  near  the  top,  and  still  another  seam  II  to  13  feet 
thick. 
The  Wise  and  Ratcliff  banks  (R),  on  Williams  Fork,  near  its  mouth,  are  on  scams  of  the 
middle  coal  group.  The  Wise  bank  shows  S  feet  of  coal,  with  a  shale  roof,  but  the  actual 
thickness  of  the  seam  may  be  somewhat  greater.  The  Ratcliff  bank,  on  a  school  section, 
was  being  worked  under  lease  at  the  time  of  visit  and  most  of  the  coal  was  being  hauled 
to  Craig.  The  opening  was  driven  in  1(H)  feet ,  and  measurements  of  the  seam  showed  10 
feel  7  inches  of  coal  without  partings,  of  which,  however,  the  lower  lb  inches  were  not 
mined.  The  mine  has  been  worked  in  large  rooms  and  the  roof  has  caved  badly  in  places. 
It  is  timbered  with  long  poles  set  about  3  feet  apart  and  is  lit  ted  with  a  1-ton  car  and  a 
small  wooden  frame  tipple.  A  4-foot  seam  is  reported,  lying  about  oO  feet  below  this 
seam,  and  both  appear  to  overlie  strat  igraphically  the  seam  of  the  Wise  bank.  The  upper 
coal  group  is  opened  at  the  Joseph  Ilaubrich  bank,  on  Yampa  River,  just  above  the  forks. 
The  bank  showed  a  thickness  of  6  feet  4  inches  of  coal  and  has  a  shale  roof.  This  coal 
lies  just  above  the  massive  white  sandstone  that  marks  the  base  of  the  upper  group. 
About  hallway  between  the  forks  of  Yampa  River  and  the  town  of  Craig,  near  Woods 
Ranch;  or  "Big  Bottom,"  Yampa  River  cuts  through  .  low  anticlinal  fold  and  exposes 
coals  of  the  middle  group  along  its  banks  (S).  A  number  of  valuable  seams  are  probably 
accessible  here. 
