smith]  CEMENT    RESOURCES    OF    ALABAMA.  443 
Analyses  by  Doctor  Mallett  of  other  specimens  of  this  chimney  rock 
are  here  presented.  No.  43  is  of  a  clay  from  Colonel  Darrington's 
place,  in  the  lower  part  of  Clarke  County  near  Gainestown,  and  44 
and  45  are  from  other  localities  in  Clarke  County  near  the  rivers. 
Localities  along  the  line  of  the  Southern  Rail/way. — At  Glendon 
station,  a  few  miles  east  of  Jackson,  there  is  an  exposure  of  the 
chimney  rock  close  to  the  track.  The  rock  here  is  about  %)  feet 
thick,  and  the  limestone  is  covered  by  a  bed  of  red  residual  clay 
similar  to  that  at  St.  Stephens  and  Oven  Bluff.  The  same  chimney 
rock  may  be  seen  along  the  road  between  the  station  and  Jackson,  and 
no  doubt  it  occurs  from  Glendon  up  to  Suggsville  station,  within  con- 
venient reach  of  the  railroad.  At  Suggsville  station  the  same  rock 
occurs  along  the  road  leading  from  station  to  the  town.  This  place  is 
within  a  short  distance  of  the  railroad. 
Between  Suggsville  and  Gosport  the  country  rock  is  the  St.  Stephens 
limestone,  but  no  particular  attention  was  given  to  it  for  the  reason 
that  no  railroad  crosses  the  country  along  this  line. 
Along  Alabama  River. — At  Perdue  Hill  the  St.  Stephens  rock  out- 
crops near  the  base  of  the  hills  which  descend  to  the  terrace  on  which 
the  town  of  Claiborne  stands.  The  bluff  at  Claiborne  Landing  shows 
near  the  summit  the  calcareous  clays  or  clayey  limestone  which  lies  at 
the  base  of  the  St.  Stephens  formation,  and  which  is  generally  thought 
to  be  the  equivalent  of  the  Jackson  group  of  the  Mississippi  geologists. 
It  is  quite  possible  that  this  rock,  where  it  occurs  in  sufficient  quantity, 
may  be  suitable  for  cement  making,  since  it  has  a  composition  not  far 
different  from  much  of  the  Rotten  limestone  or  Selma  chalk.  No 
investigations  have  yet  been  made  concerning  it,  for  the  reason  that 
there  are  comparatively  few  points  where  it  appears  in  adequate  thick- 
ness and  in  favorable  localities  as  regards  transportation. 
At  Marshalls  Landing,  just  above  the  mouth  of  Randons  Creek,  is 
the  first  exposure  of  the  chimney  rock  along  Alabama  River.  This 
occurs  at  the  top  of  the  bluff.  It  has  the  usual  covering  of  residual 
clay.  Below  the  orbitoidal  or  chimney  rock  at  Marshalls  there  are  20 
feet  or  more  of  a  porous  limestone.  In  the  same  bluff  there  are  beds 
of  calcareous  clay  which  might  possibly  be  used  in  mixing  with  the 
limestone.  At  the  landing  these  would  be  difficult  to  quarry  because 
of  overlying  strata,  but  they  would  certainly  be  found  without  cover 
along  the  bluffs  above  Marshalls  if  they  should  prove  of  value. 
From  Marshall's  down  to  Gainestown  Landing  the  river  bluffy  show 
beds  of  the  limestone  at  numerous  points.  At  Gainestown,  the  top- 
most bed  of  the  St.  Stephens,  the  hard  crystalline  limestone  occurs  not 
far  above  the  water  level  in  the  river.     This  stone  has  been  cut  and 
