AYA PROCEEDINGS OF THE NATIONAL MUSEUM. VOL. XXXIV. 
A section very similar to the above is exposed at the Webb or Rise 
Mill, just south of Linden. The formations and thicknesses exposed 
here are as follows: : 
Section at Webb or Rise Mill, near Linden, Tennessee. 
Feet. 
Devonian. 
Chattanooga black *shaile 25 v4 23 are BE age ae ails Covad ee eee an —_ 
Silurian. 
DEGA TUT IME SCOM Cte oe es ek ues eee ae We ecm 16 
Lobelville formation. 
Coral, 2Zones==2 ee BS ASA SE a Rap 40 
Bryozoan zone. 
Blue shales) with bryozoa and corals 2232252 eee 18 
Red clay shales with base not observed______ ERED ei yy ese Ne Ne Pane iat 
A columnar section of this locality was given by Foerste* in which 
the basal red shales are referred to the Dixon. In his text this ref- 
erence is made doubtful, and he notes that the exposures around 
Linden are peculiar in not displaying the great wealth of brachiopods 
and sponges characteristic of more southern exposures. If our 
studies are correct, these peculiarities are readily explained by the 
position of the strata above the brachiopod (Bob) and sponge 
(Beech River) beds. To us the most striking feature of this and 
other localities near Linden is the great resemblance of the coral beds 
to the late Niagaran section at Louisville, Kentucky. 
The upper zone of the Lobelville formation is so well charac- 
terized by its prolific coral fauna that no difficulty should be experi- 
enced in its recognition. The strata are usually whitish shales so 
prolific in fossils that their disintegration upon hillsides leaves the 
ground fairly covered by the specimens. A particularly fine example 
of a glade formed by the weathering of these coral beds is the Grave- 
yard Glade, 14 miles west of Bob. The section here extends from 
probably the top of the Beech River formation to the Decatur lime- 
stone occurring in bowlders on the top of the hill, but the corals from 
the coral beds have so covered the underlying strata that the succes- 
sion could not be determined with accuracy in the time available. The 
corals, determined from a preliminary study of the fauna in this 
horizon at the Graveyard Glade, are listed below. Every one of these 
species occurs in the uppermost Niagaran strata at Louisville, Ken- 
tucky, and we do not know of a clearer case of equivalent: rocks, 
judged by faunal evidence. 
4 Journal of Geology, XI, 1903, p. 578. 
