140 CARBONIFEROUS LIMESTONES OF MISSOURI. 
Of similar formation is the country comprised in the neck of land lying between 
Charbonniére, on the Missouri River, and the Grand Chain, on the Mississippi. 
A few unimportant outliers have been detected, on both sides of the Missouri 
River, beyond the general confines of the Illinois coal-field, in St. Charles and St. 
Louis Counties, namely, on the ridges giving source to the waters of Coppermine 
Creek, on the north, and on the south, in the ridges between the Missouri and _ 
Meramec. 
In no instance have I discovered a workable bed of coal beneath the limestones 
on which the city of St. Louis stands; although I have been able to inspect the 
strata underlying that member of the subcarboniferous limestone in more than fifty 
sections in Iowa and Missouri. 
