fuller.]  HYNER   GAS    POOL,   CLINTON    COUNTY,  PA.  395 
not  be  found.  The  oil  and  gas  fields  in  regions  of  folded  rocks,  how- 
ever, are  generally  relatively  small,  both  in  area  and  in  quantity  of 
production.  The  absence  of  any  large  field  is  borne  out  by  the  consid- 
erable number  of  unsuccessful  "  wild-cat"  wells  which  have  been  sunk 
in  northern  Pennsylvania  at  various  times  in  the  past.  Oil  and  gas 
may  occur  at  depths  greater  than  any  yet  reached  in  the  region,  but 
profitable  pools  are  unlikely. 
The  geologic  structure  most  favorable  to  the  accumulation  of  gas  or 
oil  is  the  anticline,  the  gas  normally  occurring  at  the  crest  and  the  oil 
a  little  to  one  side.  The  Hyner  anticline  is  very  low  at  Hyner,  but 
gradually  increases  in  height  to  the  east.  The  chances  for  oil  and  gas 
are  generally  better  in  the  lower  and  flatter  portions.  In  the  Hyner 
locality,  considered  by  itself,  it  is  probable  that  less  trouble  would  be 
had  with  the  salt  water  at  a  point  slightly  to  the  east  of  the  present 
wells  and  higher  up  on  the  gradually  rising  crest  of  the  anticline. 
