444  CONTRIBUTIONS   TO    ECONOMIC    GEOLOGY,  1903.  [bull. 225. 
polished  and  proves  to  be  a  first-rate  marble,  inasmuch  as  it  takes  a 
good  polish  and  shows  agreeable  variations  in  color.  The  soft 
chimney  rock  underlies  the  hard  limestone  here  as  at  other  points. 
At  Choctaw  Bluff,  some  miles  below  Gainestown,  there  is  the  last 
exposure  of  the  Tertiary  limestones  on  this  river.  The  material  is  an 
argillaceous  limestone  with  numerous  fossils,  but  it  seems  hardly  likely 
to  be  of  use  in  cement  making. 
Between  Alabama  River  and  the  main  line  of  the  Louisville  and 
Nashville  Railroad. — A  few  miles  east  of  Marshalls  Landing,  at 
Manistee  Mills,  the  terminus  of  a  sawmill  road,  there  is  a  quarry  of 
the  chimney  rock,  which  is  conveniently  situated  as  to  transportation, 
since  it  is  on  the  railroad.  Across  the  county  to  the  Repton  Branch 
of  the  Louisville  and  Nashville  Railroad,  the  St.  Stephens  limestone 
may,  of  course,  be  found  at  thousands  of  places,  but  no  mention  is 
made  of  these  occurrences  where  they  do  not  lie  on  railroad  line. 
Below  Monroe  Station,  near  Drewry,  on  the  Repton  Branch,  this 
road  crosses  the  line  of  outcrop  of  the  chimney  rock,  which  at  a 
number  of  points  in  the  vicinity  of  Drewry  lies  within  easy  reach  of 
transportation. 
A  few  miles  below  Drewry,  at  Manistee  Junction,  there  is  a  fine 
exposure  of  Grand  Gulf  clays  in  railroad  cuts  both  north  and  south  of 
the  station. 
Analysis  is  given  (59)  of  the  clays  from  three  horizons  in  these  cuts, 
from  which  their  suitability  for  admixture  with  the  limestone  may  be 
determined. 
On  the  main  line  of  the  Louisville  and  Nashville  Railroad. — The 
chimney  rock  may  be  found  at  many  points  below  Evergreen  in  the 
vicinity  of  Sparta  and  Castleberry  stations.  There  are  many  bluffs  of 
this  rock  on  the  banks  of  Murder  Creek  in  this  vicinity,  and  there  are 
several  quarries  from  which  the  stone  has  been  obtained  for  building 
purposes,  within  short  distances  of  the  railroad  line.  At  the  foot  of 
Taliaferros  Heights  the  limestone  forms  high  bluffs  on  the  creek,  at 
Ellis  Williams  Spring  there  are  bluffs  with  the  soft,  rock  at  the  base 
and  the  hard  horse-bone  rock  at  the  top,  and  on  the  creek  bank  a  few 
hundred  yards  away  is  one  of  the  quarries  mentioned  above.  In  fact 
the  localities  where  the  rock  may  be  found  within  convenient  distance 
of  the  railroad,  and  in  a  position  favorable  to  cheap  quarrying,  are 
numerous  in  all  this  region.  No  clays  were  seen  except  the  usual 
residual  clays  from  the  decomposition  of  the  limestone  and  a  clay 
occurring  close  to  Evergreen  in  the  pits  of  Wild  Brothers.  Analyses 
41  and  4W2  will  show  sufficiently  well  the  character  of  the  limestone  in 
in  this  section. 
These  Evergreen  occurrences  have  attracted  attention  because  of 
their  location  on  the  line  of  a  great  railroad  system  within  short  dis- 
tance of  lido  water. 
