312         CONTRIBUTIONS    TO    I       >NOMIC    GEOLOGY,    L907,    PART   IT. 
A  well-exposed  section  was  found  near  the  east  bank  of  the  river 
at  the  mouth  of  Spring  Creek,  about  one-half  mile  southwest  of  the 
289  milepost  on  the  Utah- Wyoming  State  line.  Here  the  Mesaverde 
formation  contains  many  massive  sandstones  and  intervening  shale 
bodies,  which  are  very  similar  in  character  to  the  same  formation  in 
the  Yampa  field.  The  whole  formation  was  not  examined  in  detail, 
but  coal  was  found  in  it  at  several  horizons.  A  small  amount  of 
prospecting  uncovered  some  beds  at  least  5  feet  thick,  and  local 
reports  state  that  the  coal  has  been  taken  out  at  some  point  west  of 
the  river  for  use  at  the  ranches  in  the  valley. 
Opposite  Linwood  post-office,  about  one-fourth  mile  north  of 
Henrys  Fork,  two  thick  beds  of  coal  are  exposed  in  nearly  vertical 
position.  These  beds  have  been  prospected  somewhat  but  have  never 
been  worked  to  any  considerable  extent.  The  following  section  was 
measured  at  this  place: 
Section  of  coal-bearing  strata  north  of  Linwood,  Utah. 
Ft.    in. 
Sandstone,  coarse,  yellowish,  flaggy,  and  thin  bedded 15 
Coal,  apparently  good,  without  partings 8     9 
Shale,  blue  and  gray,  fine 20 
Coal,  apparently  good,  without  partings 10 
Bone,  irregular  bed 1 
Sandstone,  fine  grained,  clayey,  white 20+ 
74     9 
The  strike  of  the  beds  is  N.  67°  W.  and  the  dip  80°  to  85°  S.  The 
outcrop  of  this  bed  splits  up  within  less  than  200  yards  to  the  west, 
and  the  bed  changes  in  character,  becoming  chiefly  a  brown  and  gray 
shale  with  coal  streaks.  Toward  the  east  the  bed  follows  the  course 
described  for  a  few  hundred  feet,  then  bends  abruptly  south  and  dis- 
appears under  an  upper  terrace  level  capped  by  consolidated  river 
deposits.  In  the  next  gulch  to  the  east,  one-fourth  mile  or  so  away, 
beds  of  soft  black  shale,  evidently  representing  the  same  horizon,  have 
been  prospected.  Although  resembling  coal  somewhat  in  appearance, 
the  material  is  merely  a  dark  clay  shale.  These  beds  have  been  filed 
on  as  coal  land  from  time  to  time,  but  the  filings  have  always  been 
allowed  to  lapse  without  making  final  proof. 
As  these  beds  occur  along  a  line  of  evident  structural  displacement, 
probably  a  fault  of  considerable  magnitude,  it  is  not  certain  to  what 
formation  they  may  properly  be  assigned.  The  inclosing  beds  resem- 
ble the  Mesaverde  strata,  and  their  position  overlying  the  Mancos 
shale  suggests  that  they  belong  to  that  formation.  Coal  is  also  found 
in  the  overlying  Tertiary  strata,  some  of  which  might  not  be  easily 
distinguished  from  the  Mesaverde. 
