410 PROCEEDINGS OF THE NATIONAL MUSEUM. VOL, XXXIV. 
As noted before, our attention was directed more particularly to 
the Brownsport bed and succeeding strata, or, in general terms, the 
late Niagaran rocks. These strata have furnished by far the most 
of the fossils from the glade region, and reference by most authors 
to the Niagaran fauna of Western Tennessee is not to the Clifton 
limestone as a whole, but to this particular division. Careful col- 
lecting and detailed stratigraphic work has convinced us that the 
post-Dixon strata of Niagaran age, instead of being a bed of hetero- 
geneous clayey shale and limestone, referable to only one formation, 
the Brownsport, contains at least four divisions well marked faunally 
and lithologically, and interesting furthermore because of their un- 
conformable development. Accepting the term Brownsport and _ 
defining it as a group, we would propose in addition the following 
new formations: Beech River, Bob, Lobelville, and Decatur. The 
several classifications proposed for these rocks may then be tabulated 
as follows: 
Niagaran strata of West Tennessee. 
Safford, 1869. Foerste, 1903. Pate and Bassler, 1908. 
Decatur. 
‘ Coral zone. 
Gant. Lobelville. | 
hs Bryozoan zone. 
we S Conchidium zone. 
8 2 Bob. [pessoas zone. 
= Sponge bearing bed. z Uncinulus zone. 
S 5 Eucalyptocrinus zone 
5 TOM ESD OLU: Beech River. [roontcrn zone. 
s ; Coccocrinus zone. 
g Menis- 
fs ei Dixon. Dixon. 
Lego. Lego. 
wan oben Waldron. 
‘(Variegated bed. — Laurel. Laurel. 
Osgood. i Osgood. 
Clinton. |taddox. Clinton. 
SECTIONS. 
In order to show the character and occurrence of these divisions, 
we have thought it best to first give detailed sections at (1) the type 
locality of the Clifton limestone, (2) at Brownsport Furnace, whence 
the Brownsport group derives its name, (3) at Decaturville, and 
(4) at several other localities where variation from these more com- 
plete sections have been noted. The individual formations of the 
late Niagaran are then discussed, followed. by our interpretation 
of the complete section of the area, constructed from the various 
localities studied. Finally the occurrence of the same faunas in areas 
other than West Tennessee, is noted. 
