210 The American Geolo(/ist. April, 1895 
it will be seen that the northwestern corner of ( 'acUlo parish 
most proba])ly is Lignitie. I have not been able to examine 
that area. 
Lover Chdhorite Stjuje. 
This stage covers by far the largest area of any of the sub- 
divisions of the Eocene in Louisiana, extending south from the 
Arkansas line to Georgetown, on Little river, to St. Maurice 
at the mouth of Saline bayou on the Red river, and to Proven- 
cal on the T. & P. railway. Lower Claiborne fossils have 
been found in Bossier, Webster, Claiborne, Bienville, Jackson, 
Winn, Natchitoches and Grant parishes. 
In Alabama* the Lower Claiborne is divided into: 
Ostroa seUiPformis bods, 
TJsbon beds, and 
lUilirstoiit". 
In Mississippi Dr. Hilgardf divides the Claiborne, below 
the Lignitie bed separating the Claiborne of that state from 
the Jackson, into 
( 'alcareous, and 
Silicious Claiborne. 
Smith]; writes : "From the section given in Hilgard's re- 
port, it seems that the middle part of what we have called 
the Claiborne series, containing the great number of Ostrect 
selld'formis, are the beds of the Calcareous division, best de- 
veloped in that state. "Jj 
The Silicious Claiborne represents in large part the Buhr- 
stone of Alabama. This formation in Alabama and Missis- 
sippi receives its name from the peculiar lithologic characters 
of its constituent rocks, which find no counterpart in Louisi- 
ana. As the Buhrstone in these two states is not character- 
ized by well preserved fossil organisms, it is not possible to 
make any precise correlation in the Louisiana section. 
The localities in which Lower Claiborne fossils have been 
found have already been indicated. The following are the 
general lithologic characters presented by that stage in Lou- 
isiana. In Caddo and De Soto parishes and in Natchitoches 
*G. D. Harris: Am. .Tourn. Sci., April, 1894. Also see Smith and .lolni- 
son, Bull. 48, U. S. Geol. Snr., 1887. 
fAgricullure and Gool. of ]Miss., p. ]()8. 18()0. 
t-Bull. 43, U. S. Geol. Siir., ii. 2."). 1887. 
J^Tlie author is not allont'tlier certain about Smitii's correlal inn. 
