338         CONTRIBUTIONS   TO   ECONOMIC    GEOLOGY,  1906,  PART    I. 
A  section  made  in  the  pit  of  this  company  is  as  follows: 
Section  of  pit  of  Canton  Tile  Hollow  Brick  Company. 
Ft.      in. 
Olive  fissile  shale  stained  red 3      0 
Carbonaceous  layer  I  ( Marion  coal  blossom  ?) 4 
Sandy  ledge 10 
Dark-drab  shale IS      0 
Drab  plastic  clay,  soft 5      0 
Drab  plastic  clay,  hard,  siliceous 5      0 
Olive  sandy  shale • 10      0 
Sandstone. 
Kittanning  horizons. — At  some  localities  there  are  at  least  four  Kit- 
tanning  coals,  each  underlain  by  a  clsij  bed.     The  upper  clay  beds  sol 
far  known  are  unimportant.     The  plastic  clay  below  the  lower  Kit- J 
tanning  coal  is  undeveloped,  but  road  crops  and  mine  sections  through- 
out the  quadrangle  indicate  that  it  is  persistently  present  and  prob- I 
ably  of  sufficient  thickness  for  mining.     Among  the  best  road  expo-1 
sures  is  one  a  quarter  of  a  mile  east  of  Jack  schoolhouse  and  about  1 
miles  northwest  of  Newr  Bethlehem,  where  3  feet  of  reddish  stained! 
clay  outcrop,  and  one  1  mile  east  of  Mechanicsville,  where  8  feet  of 
light-drab  clay  are  exposed.     The  following  sections,  comprising  21 
feet  or  more  of  clay,  were  measured  below  the  Lower  Kittanning  coal 
in  country  banks  and  mines: 
A.  V.  I  Jonfer  coal  bank,  just  easl  of  Strattonville;  :i  feel .  apparently  of  good  quality] 
Coal  bank  on  Lewis  Deitz  farm.  Ml  miles  northeast  of  Sligo;  -  feet,  of  excellent 
appearance. 
.1.  K.  Andrew-  coal  bank,  on  James  Myers  farm,  3  miles  northeasl  of  Sligo;  :'»  feel 
lo  inches. 
Country  bant  <>w  Charles  McCall  farm,  :'.'.  mile-  northeasl  of  Etimersburg  station;  G 
Eeet,  lighl  gray  clay. 
Countrj  bank  -  miles  northeasl  of  Wild  Cat:  2\  feet,  quite  free  from  sand. 
Only  a  partial  thickness  of  the  (day  was  seen  at   any  of  the  above] 
places,  but  the  measurements  are  suggestive  of  considerable  deposits 
of  (day  at  litis  horizon.     At  Jluey,  just  over  the  west  boundary  of  the 
quadrangle,  is  a  drift  in  which  7\  feel  of  (day  were  measured,  both  the  I 
top  and  the  bottom  of  the  section  being  concealed.     The  thickness  of  J 
the  clay  here  indicates  that  a  good  deposit   may  be  found  along  the 
Sligo  branch  of  the  Pennsylvania  Railroad  wherever  the  clay  occurs] 
above  drainage.    The  plastic  clay  from  the  Lower  Kittanning  horizon 
could  be  prospected  with  a  view  to  brick  or  pottery  manufacture. 
The  other  clay  in  use  from  the  Kittanning  horizons  is  the  one  next 
higher,  or  the  Middle  Kittanning.  This  clay  is  used  by  the  Hawthorn 
Pottery  Company  in  the  manufacture  of  Bristol  glazed  stoneware. 
The  supply  is  obtained  from  a  stripping  just  north  of  Hawthorn. 
The  clay  here  lies  under  4  to  10  feet  of  cover  and  varies  in  thickness 
from  4  to  6  feet.     The  upper  part  of  the  bed  is  soft,  rather  free  from 
