and Superior Formations of West Tennessee. 371 
lignite, by which it is characterized, do not ear to extend 
very far east from the range of the bluffs. (See section 6.) In 
my “ Reconnoissance,” p. 102, may be found asection illustrating 
the Bluff formations. Below, I give another taken on the Missis- 
sippi, at Randolph, Tipton county, the river being four or five 
eet above low-water mark. 
8. Bluff Loam, 68 feet. 
Fine siliceous earthy matter of a light ashen or a light buff color, 
in an easterly direction beneath the gravel; at least, the beds of 
a 
6. Bluff Lignite, 90 feet. 
inches thick. Some thin laminz of lignite occur below this bed. 
This portion in all, - - - - - 48 ft. 
A portion not exposed in place where the section was taken, but 
seen in part at another point; consists of laminated sand ee 
above. Down to the water's edge. 2 ft. 
aves from the Bluff lignite, at least from the portion in 
Tennessee, haye not, so far as I know, been examined. 
by Mr. Lesquereux. (This Journal, [2], xxvii, 364.) 
ies i kness from ten to 
with everywhere more or less coarse gravel, and has usually 
alayer of white or variegated clay at its b gravel 1s 
ase. 
generally the most conspicuous portion. This is sometimes ce- 
_ This bed is remarkable for its extent in a general direction 
Parallel with the river. It is seen along the face of the Missis- 
sippi bluff, from the Mississippi state line to Kentucky, and both 
Ways much beyond these limits. 
* Thave gi i the line of bluffs that all along overlook 
A step sd deepen oe Rigs tter The bluffs are the western esca 
ttom. This escarpment is cut by the narrow 
ys of the rivers flowing from the east, but for general purposes may be regarded 
tinuous. 
