of the United States. 41 
Mineral Contents. om some situations it contains large 
quantities of iron pyrite 
Springs. The water miele by this formation is very 
unhealthy, and in many situations the scarcity of it presents 
a serious impediment to cultivation; in Alabama they have 
sunk in this stratum three hundred feet to find good water, 
but have not succeeded in penetrating through the limestone. 
Geographical Extent. It commences at the Eutaw springs 
near Santee river in South Carolina, passes to Orangeburgh, 
and crosses the Savannah river fifteen miles below Augus- 
ta, occasionally disappearing under the san 
be traced to Burke County i in Georgia, 
erosses the Ogeechee near Louisville; then near Sanders- 
ville, passing through Wilkinson County ; it is then found 
at St. Mark’s in Florida, where the tower and fort are built 
of this limestone. The basis of the land omits the north- 
east boundary of the Sea of stesooe tae ervey of it it; 
and proceeding in a north-w st head of 
the Choctaw creek, it ment “the Alabama! river "near ear Ca- 
hawba, where thie: formation expands, and forms a basin 
one hundred miles square, comprising the counties of 
Montgomery, Dallas, Wilcocks, Greene, Marengo, and 
part of Washington, in the State of Alabama. On many 
parts of the surface in these signe Ye there is a-rich loam ; 
to Alach re 
Ga piaiis 
6. Upper Marine Formation. - 
a7 Europe one part of this is usually, distinguished by 
large tracts of sands, which not only afford no return to the 
farmer, but rebel against bis dominion, and destroy his im- 
provements. 
‘The 
sands of Norfolk, Pomerania, Ostend, Bayonne and 
coast of France, - of sand re like an enemy upon 
Vou. VII.—No. 
