CKEL] MISSISSIPPI. 215 
Well on A. G. Cunningham's land, H miles west of mouth of James Creek. 
Feet. 
epth of well 500 
hickness of limestone 100 
J < 7 ell is 75 feet above Tombigbee River. Water overflows. 
Well at Pickinsville, Ala. , on land of Will Rodgers. 
Feet. 
hickness of limestone 100 
'epth of well 400 
lows. 
i 
All wells mentioned above except the first one were drilled by J. B. 
bnningham, Cliftonville, Miss., and the records were obtained from 
in. The well drillers fail to make anv distinction between the lower 
elma and the upper Eutaw, so that their records can not be depended 
pon for determining' the thickness of the Selma. 
A sample of sandy limestone was obtained from the mouth of James 
Seek, on Tombigbee River. Along the Tombigbee at the mouth 
f James Creek there is an exposure of a green-sand clay containing a 
irge amount of lime. Fifty feet above the river, 1£ miles west of 
he mouth of James Creek, another sample of limestone was collected. 
?he limestone here is similar in color and general aspect to that on 
tombigbee, except that it has less green sand. 
Farther west the limestone rarely shows at the surface. It is clayey 
n character and easily dissolved b}^ the weathering agents, so that it 
)reaks down into soil faster than it is carried away by erosion. 
At Cliftonville, which is 75 feet above Tombigbee River (barometric 
eading), there is a hard cap rock, 2 to 4 feet thick, found on top of 
he hills in the vicinity of the town'. This a hard "lime" rock, sim- 
ar to that found at Prairie Point. 
Below this hard cap rock comes what is called the " blue rock." A 
Maniple of it seen at a well dug years ago shows that it is similar to the 
rock at Cunningham Hill, except that it contains no sand. Where 
the blue rock comes to the surface it forms a belt of the richest soil in 
the prairie region. The soil is very deep, black, and loose. More 
ootton and corn are raised to the acre here than in any other section 
of the State. 
West of this region the land becomes higher, and the Lafayette 
occupies the surface on the ridges. 
Six miles north of Macon, on the Macon and Columbus road, the 
limestone begins to show at the surface in small gullies. The rock is 
harder than the blue rock along the Tombigbee, and therefore occurs 
more frequently. 
A sample collected from this locality by A. F. Crider was analyzed 
by W. 8. McNeil in the laboratory of the United States Geological 
Survey. 
