The American Geologist, Vol. XV. 
Plate IX. 
FiG 2 
Fl6l 
4(,RAYSAN0.8 
SSANOrCWrlNSTOfAKSJ 
(. II6NITC Z'b" 
REOClA'r WITH SOME SAND i 
2 miOWISHCLAY 2 
'3 OOLOMITIC SANDY IIMCSTONE &" 
4 YELLOW CLAY l' 
5 YELLOW SAND PASSING INTO 3' 
6.6lAUtONITIC SAND. 4 
FiG. 3. 
FiG. 4. 
l.(.RAVELINCLAY. 
Z, LAMINATED SANDS 
CLAY, NO FOSSILS, li' 
3 LAMINATED CLAY 5' 
4 6REENGIAL)C0NITIC«ND 
li(l*YWlTHSEAMSOF 
IRON ORE IS'MANY 
FOSSILS 
6 RIVER ALLUVIUM . 
F|&.7. 
I tRAVELINCLAY. 
3 LIGNITE SEAM 
■i RIVER ALLUVIUM , 
Fig. 8 
1, RIVER ALLUVIUM 20 
2 MARL 1 
3 INDURATEDCALCAREOUS CLAY IB 
4&RAYF0SSILirER0US MARL 6 ' 
5 LICNITE. SEAM. 
6 LAMINATED SANDS a-Cl AY, 20 
TBLACK OR GREEN LAMINATID 
CLAY. 2' 
FiG 3. 
STRATIGRAPHY OF NORTHWESTERN LOUISIANA. 
