butts  ]  WARRIOR   COAL   BASIN,   ALABAMA.  361 
Generalized  section  of  Carboniferous  rocks  of  Warrior  field — Continued. 
Thickness. 
Character  of  rocks. 
Aver- 
age. 
Mini- 
mum. 
Maxi. 
mum. 
Shale  and  sandstone . 
Nickel  Plate  coal 
Feet. 
18 
7 
80 
5 
180 
Feet. 
10 
5 
00 
4 
Feet. 
20 
9 
Shale  and  sandstone 
100 
American  coal . 
0 
Sandstone,  with  shale  bands 
Shale 
310 
o 
50 
Mary  Lee  coal 
Shale  and  sandstone 
Blue  Creek  coal . 
8 
40 
4 
50 
H 
G 
10 
Shale 
Jagger  coal 
2 
0 
Shale,  with  sandstone  beds  at  top _ . 
Ream  coal .       ...                                    . .  .   
0 
5 
Shale  and  sandstone 
250 
4 
50? 
Jefferson  coal   
1 
Shale? 
Black  Creek  coal  . 
o 
140 
o 
40 
1 
60 
1 
too 
300 
350 
i 
4 
Shale . 
Coal  (seam?) 
Shale 
Small  coal .  _       . .       .    ....       ...   
Shale. . 
Small  coal 
Sandstone 
Shale 
Shale  and  sandstone 
Sandstone  of  Rock  Mountain 
Total 
3,0751 
The  highest  rocks  stratigraphically  in  this  part  of  the  Warrior 
basin  appear  to  cap  a  high  knob  situated  in  the  southeastern  angle 
I  between  Davis  and  Rockhall  creeks,  about  1  mile  a  lit  lie  southeast  of 
their  junction.  On  this  knob,  above  the  sandstone  described  below. 
are  indications  of  shale  which  may  be  50  feet  or  more  in  thickness. 
Below  this  shale  is  about  30  feet  of  a  somewhat  shaly  sandstone;  what 
is  regarded  as  the  same  sandstone  caps  a  high  knob  crossed  by  the 
road  1  mile  north  of  Liberty  Church,  and  another  knob  about  one-half 
