374  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,  1904.         [bull.  260. 
Section  of  Mary  Lee  seam  in  Little  basin  northeast  of  Adger.  * 
Shale :  Inches. 
Coal,  shale  partings 9 
Coal    smut 11  to  12 
Mineral   charcoal i 
Coal  smut 7  to  8 
Shale 4 
Coal 3 
Shale I 
Coal    smut Gto7 
Total    40|  to  43| 
Section  of  Mary  Lee  seam  in  Little  basin  near  Blue  Creek  Church. 
Inches. 
Coal  smut ._ 22 
Coal  and  shale 4 
Total   26 
Section  of  Mary  Lee  seam  in  Big  basin  near  Connellsville. 
Inches. 
Coal,  called  cannel  coal GO 
Black  band  ore T 24 
Total    coal 60 
The  Blue  Creek  seam  is  mined  in  the  Little  basin  and  has  a  thick- 
ness of  from  G  to  10  feet.  It  is  much  broken  by  shale  partings,  some 
of  which  may  reach  a  thickness  of  1  foot.  This  seam  underlies  15  to 
20  square  miles  of  the  Little  basin,  and  probably  is  a  thick  seam  along 
its  outcrop  on  the  margin  of  the  Big  basin. 
The  following  sections  indicate  its  character : 
Section  of  Blue  Creek  seam  in  Big  Basin,  1  1/2  miles  west  of  Adger. 
Inches. 
Coal    5 
Clay    •   5 
Coal    j 30 
Clay    0 
Coal    18 
Clay    4 
Coal 6 
Total 74 
