372  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,   1903.  [bull. 225. 
The  following  sections  of  the  coal  seams  have  been  measured: 
Section  in  tunnel  on  east  bank  of  Carbon  Creek. 
Ft.  In. 
Dark  shale 2  0 
Coal 20  0 
Massive,  arkosic,  cross-bedded  sandstone  with  many  thin  carbo- 
naceous streaks 10  0 
The  strike  at  this  point  is  N.  65°  E.  The  roof  of  the  seam  dips  60° 
N\\\,  the  floor  78°  NW. 
About  100  yards  northwest  of  this  point  a  seam  containing  about  3 
feet  of  clean  coal  has  been  exposed.  One  mile  northwest,  at  what  is 
known  as  Doyle  Camp,  a  coal  seam  20^  feet  thick  is  exposed.  The 
strike  of  the  roof  is  N.  10°  E. ,  of  the  floor  N .  30°  W. ;  the  dip  is  from 
75°  to  85°  E.     Both  roof  and  floor  are  very  irregular. 
Section  1  mile  northwest  of  canoe  landing  on  Shepherd  Creek. 
Ft.  in. 
Coal : 3    0 
Shale 0    2 
Coal 4    4 
The  strike  at  this  point  is  N.  20°  E.,  the  dip  65°  NW.  This  open- 
ing is  on  the  west  side  of  the  valley  of  Shepherd  Creek,  at  an  elevation 
of  about  200  feet  above  the  lake. 
Four  seams  are  exposed  on  the  east  bank  of  Canyon  Creek.  Three 
miles  above  the  mouth  of  Canyon  Creek  the  coal  has  a  thickness  of 
2  feet,  9  inches.  It  is  overlain  \>y  sandstone  and  has  a  shale  floor. 
The  strike  is  N.  80°  E.,  the  dip  35°  W.  The  section  was  measured 
at  the  level  of  the  valley  floor.  This  seam  is  variable  in  thickness 
pinching  out  somewhat  higher  in  the  bluff. 
Four  miles  above  the  mouth  of  Canyon  Creek  the  coal  has  a  thick- 
ness of  4  feet,  2  inches;  it  strikes  N.  10°  E.,  and  dips  60°  W.  It  has  ai 
shale  roof  and  shale  floor. 
At  the  south  end  of  Carbon  Mountain  there  is  a  high  bluff  where 
Bering  River  has  been  pushed  against  the  end  of  the  mountain  by  the 
Bering  Glacier.     In  this  bluff  the  following  section  was  measured: 
Section  at  south  end  of  Carbon  Mountain. 
Feet. 
Sandstone 30 
Coke 1 
Sandstone 20 
Coke 2 
Sandstone 2  to  5 
Coke 1  to  5 
Sandstone 3 
Coke 1 
Sandstone 8 
Coke 1|  to    2\ 
The  strike  at  this  point  is  N.  80°  W.,  the  dip  from  20°  to  25°  N. 
