136  CONTRIBUTIOKS    TO   ECONOMIC    GEOLOGY,  1906,  PART    I. 
1.  Section  of  Rock  wood  formation  in  NE.  \  sec.  23,  T.  17  S.,  R.  2  W.,  near  Irondale. 
Ft.    in. 
Top  of  formation  unexposed. 
Sandstone,  yellowish,  heavy  bedded 40     0 
Unexposed 11    9 
Sandstone 4     7 
Unexposed  (probably  in  large  part  shale) 19  10 
Sandstone,- green,  flaggy,  with  yellow  shale  partings 25    0 
In »n  ( >re  ( Ida  seam  ) 
Shale,  red 
Sandstone,  ferruginous,  lamina  led 
( )re ,  sandy 
Ore.  lean,  filled  with  small  quartz  pebbles. 
I  Ire,  mi nable 
Ore,  fair  quality,  bul  no1  minedal  present. 
Ferruginous  sandstone,   ore.   and   shale,    in 
layers  I  foot  or  less  thick 
Iron  ore  (Big  seam  i 
Sandstone,  very  hard 
"Gouge,"  calcareous 
In  hi  ore  i  Trondah  seam  | 
Sandstone,  In-own.  thin  bedded,  with  shale 
Unexposed  i  probably  -hale  
Limestone  i  <  Jhickamauga). 
5 
0 
2 
1 
8 
1 
8 
5 
0 
7 
0 
(i 
0 
20 
0 
3 
0 
6 
5 
6 
20 
0 
65 
0 
2-1 1     8 
2.  Generalized  section  of  Rochwood  formation  in  Ml'.  ^  sec.  23,  T.  17  S.,  II.  '.  \V.  jus 
south  of  Red  Gap. 
Ft.  in. 
Cherl     Fori  Payne  . 
Shale    may  include  a  few  inches  Devonian) 11  0 
Sandstone,  coarse,  ferruginous 25  0 
[ron  ore,  solid  (Ida  seam) (i  <> 
Sandstone,  coarse,  ferruginous '. 25  o 
Sandstone,  coarse,  pebbly;  partially  a  low-grade  ore 22  0 
Shale " 1 
T                  ,,■               I  I'pner  part,  minable 7  0 
Iron  ore  I  />"/  seam  ' 
I  Lower  part,  not  \\i  mined  10  0 
Shale 3 
Iron  on-    Irondale  seam) 4  4 
Sandstone,  red,  soft  30  0 
Sandstone,  brown 35  0 
178  5 
3.  Section  of  Rochwood  formation  on  road  across  R<<l  Mountain,  in  NW.  \  sec.  5,  T.  1 
n. .  U.  !  W. 
Ft.  in. 
Chert     Fort  Payne). 
Sandstone  heavy  bedded 8  0 
Unexposed G  8 
Sandstone,  medium  bedded 6  9 
Unexposed 6  8 
Shale 5  5 
