138  CONTRIBUTIONS    TO   ECONOMIC    GEOLOGY)   L906,   PART    I. 
5.  Section  of  Rockwood  formation  in   Tanyard  Gap,  in  SE.   \  sec.  .,    T.   19  S.,  />'.  4  " 
Ft.    in. 
Cherl  (  Fori  Payne). 
Shale  (Chattanooga),  (less  than  1  foot). 
Sandstone,  thin  bedded 
Unexposed 
Sandstone,  dark  red.  heavy  bedded 
Unexposed 
Sandstone,  red,  heavy  bedded 
Unexposed 
Sandstone,  rod.  medium  bedded. 
Sandstone,  very  ferruginous,  with  casts  of  Pentamerus  (Hickory 
Nut  on  s<  am  ). 
Sandstone,  red,  ferruginous,  thin  bedded 
Unexposed 
Sandstone,  heav j  bedded... 
Iron  ore  i  Ida  s<  am  i :  sofl  ore,  minable 
Sandstone,  heavy  bedded 
Unexposed.. 
Sandstone,  medium  bedded 20    2 
Ore,  minable 11     0 
Shale 2    6 
Ore,  m>t  minable I     6 
Shale,    sandy,    with    thin    ere    seams,    no1 
minable 3    0 
Sandstone,  thin  bedded 2    A 
Shale 11     3 
Sandstone .    1     (i 
Shale 2    8 
Unexposed 3     9 
Shale,  sandy 56    0 
Covered  by  shale  debris L2     6 
Limestone    Chickamauga 
L2 
2 
10 
10 
8 
9 
11 
3 
4 
8 
7 
8 
3 
10 
3 
0 
2 
4 
Hi 
4 
2 
4 
•  > 
0 
3 
0 
L5 
4 
Iron  ore  I  Big  sunn  i 
235     8 
ii.  Section  of  upper  pari  of  Rockwood  formation  as  shown  by  con  from  diamond  drill, 
NE.  |  SW.  |  sec.  ii.  T.  19  S.,  R.  4  W. 
Ft.  in. 
Chert,  solidly  stratified  '  Fori  Payne  i. 
Sandstone,  red,  with  coarse  gril 5  8 
Grit,  coarse,  sofl .  with  gray  sandstone 5  8 
Limestone,  gray,  hard,  cherl  y 6  7 
Limestone,  ferruginous 31  o 
Sandstone,  ferruginous 2  7 
Sandstone,  gray,  extremely  hard  in  places 23  6 
Sandstone,  ferruginous 40  7 
Grit,  very  hard,  fine,  with  reddish  sandstone 20  2 
Iron  ore,  limy  i  Ida  seam  (?)) 2  7 
.Sandstone,  gray 7  11 
Limestone,  "marbleized" 15  0 
Sandstone,  gray,  hard 1  II 
Limestone,  ferruginous 5  8 
Sandstone,  ferruginous 22  0 
