U. S. GEOLOGICAL SURVEY 
BULLETIN NO. 138 PL. XIX 
794. 
836. 
960. 
1 000. 
Sandy clay. 
Blue clay, 
lue clay, sandy. 
Pg^ Sandy marl. 
Argillaceous 
r^= Argillaceous marl. 
Calcareous mar 
Arenaceous limestone. 
Calcareous marl. 
Arenaceous limestone. 
Calcareous mail. 
White limestone. 
Areno-calcareous marl. 
Aluminc-magnesian marl. 
Micaceous marl with pyrites. 
Marl with sandstone layers. 
Sand with considerable water. 
Hard sandstone. 
Marl, sand, and clay. 
Sandstone, very hard. 
Marl, sand, and clay. 
Sandstone. 
Dark sand and clay. 
Shell breccia. 
Blue clay with hard layers. 
Greensand. 
Marl. 
Shells. 
Marl. 
Pyntiferous marl 
sandstone. 
\rgillaceous sandstu 
POST 
PLIOCENE. 
Sand 
water bear 
ma 
Argil 
aceous sand and s 
imlstone. 
Blue 
clay and 
sand. 
with water 
Sand 
oek. 
Loose 
white sane 
withs 
andslone layer. 
s^rru— All.TiiatiiniMit sand an.Uandsli.iM-. 
COLUMNAR SECTION OF WELL AT CHARLESTON, SOUTH CAROLINA. 
