394  .CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,   1903.  [bull.  225. 
Record  of  Hyner  gas  well  No.  1,  Interstate  Development  Company — Continued. 
Chemung,  formation — Continued. 
Gray  sandstone  and  shells  . . 
Blue  slate 
Gray  sandstone  with  mica  . . 
Gray  slate  shales 
Grav  sandstone 
Thick- 
ness. 
Feet. 
25 
125 
30 
400 
12 
Depth. 
Feet. 
1,398 
1,523 
1,553 
1,953 
1,965 
From  this  record  it  will  be  noted  that  gas  was  encountered  at  576, 
950,  and  1,225  feet.  The  gases  at  576  and  950  feet  appear  to  come 
from  local  pockets,  but  a  large  and  persistent  supply  was  obtained  at 
a  depth  of  1,225  feet.  The  gas  is  reported  to  have  shown  a  rock 
pressure  of  480  pounds,  and  the  pressure  is  said  to  be  increasing 
instead  of  diminishing.  The  horizon  of  the  producing  sand  is  509 
feet  below  the  top  of  the  Chemung,  or  about  300  feet  higher  than 
the  Atwell  oil  sand  of  the  Gaines  oil  field  in  Potter  County  to  the 
north. 
The  success  of  the  well  led  to  the  sinking  of  another,  located  close 
to  the  river,  about  1,800  feet  from  the  first  and  30  feet  lower.  Like 
the  earlier  well,  it  is  supposed  to  be  situated  on  the  crest  of  the  anti- 
cline. Gas  from  the  first  was  used  in  sinking  the  second.  Fresh  water 
was  encountered  at  various  depths,  and  the  well  was  cased  to  a  depth 
of  832  feet.  Gas  was  found  at  430,  480,  604,  815,  1,068,  1,133,  and 
1,225  feet.  Strong  flows  of  salt  water  were  obtained  at  736  and  815 
feet,  and  traces  of  oil  at  860  and  1,135  feet.  The  main  gas  supply  is 
from  1,222  feet  and  has  an  open  pressure  of  20  pounds  in  a  2-inch  pipe 
and  500  pounds  closed  pressure  in  an  hour.  If,  as  the  drillers  believe, 
and  as  seems  probable,  the  gas  is  from  the  same  sand  in  both  wells, 
it  must  be  conceived  either  that  the  anticline  is  much  flatter  than 
described  or  its  axis  passes  midway  between  the  two  wells. 
Except  for  the  amount  used  in  drilling  the  lower  well,  the  gas  has 
not  yet  been  put  to  practical  uses.  If  the  supply  is  found  to  be  satis- 
factory it  will  doubtless  pay  to  connect  it  with  the  main  pipe  lines  in 
this  region,  or  pipe  it  to  Lock  Haven  or  other  towns.  It  is  too  early 
to  make  any  prediction  as  to  the  ultimate  extent  and  value  of  the 
pool,  but  the  Interstate  Development  Company,  which  controls  the 
field,  proposes  to  thoroughly  test  it. 
The  pool  is  in  rocks  which  are  very  gently  folded,  the  dip  amount- 
ing, as  indicated,  to  only  200  feet  to  the  mile.  Gas  pools,  and  even  oil 
pools,  occur  in  man}^  cases  in  equally  or  more  strongly  folded  rocks, 
and  there  are  therefore  no  known  geologic  reasons  why  both  should 
