burrows]       BARNESBORO-PATTON  COAL  FIELD,   PENNSYLVANIA.       297 
about  1,600  feet  on  the  Nolo  anticline,  a  little  west  of  Garmans  Mills. 
Northwest  of  this  anticline  the  coal  dips  rapidly  into  the  great  syn- 
clinal basin  lying  between  Nolo  and  Chestnut  Ridge  anticlines.  The 
dip  is  so  steep  that  the  coal  passes  below  water  level  on  the  west 
branch  of  the  Susquehanna,  about  1  mile  above  Cherrytree,  and  in 
much  of  the  basin  to  the  northwest  it  is  revealed  only  by  the  diamond 
drill. 
COALS. 
UPPER   FREEPORT   OR    "e"    COAL. 
The  Upper  Freeport  coal  is  not  very  extensively  worked  except  in 
the  vicinit}^  of  Barnesboro,  where  it  outcrops  in  most  of  the  ravines  at 
an  altitude  of  about  1,550  feet.  This  coal  has  a  columnar  structure, 
is  rather  hard,  shows  a  bright  fracture,  and  is  generally  free  from 
sulphur  and  iron  nodules. 
Thickness  of  the  coal. — The  bed  is  from  39  to  -ii  inches  thick.  It 
carries  some  partings  of  slate  and  bone  of  variable  thickness  and  per- 
sistence, and  is  everywhere,  so  far  as  known,  underlain  by  4  to  6 
inches  of  coal.  This  lower  stratum  is  separated  from  the  main  bed 
by  about  8  inches  of  shale  that  changes  very  much  in  character  in  dif- 
ferent parts  of  the  field,  and  is  replaced  entirely  in  some  localities  by 
fire  clay  and  lentils  of  bone.  The  lower  coal  is  not  worked.  The 
following  sections,  taken  from  different  mines  on  this  seam,  show 
more  definitely  its  bedding: 
Sections  of  Upper  Freeport  coal  in  the  vicinity  of  Barnesboro,  Pa. 
No.  1. 
Shale  roof.  Ft.  in. 
Coal 1  0 
Binder 0  2 
Coal 3  8 
Shale. 0  8 
Coal 0  4 
Fire-clay  floor. 
Total 5     10 
No.  2. 
Shale  roof. 
Coal 2      8 
Binder 0      1£ 
Coal 1      0 
Fire  clay 0      5 
Coal,  bony  0      4 
Fire-clay  floor. 
Total 4      6 
