PART, I CHAZYAN AND RELATED BRACHIOPODS—COOPER 55 
Above the Lebanon, exposures are poor and infrequent. Limestone with 
Tetradium in abundance occurs 1.35 miles south of the intersection beside a 
small stream in a pasture on the west side of the road. This limestone is sug- 
gestive of some seen in the Moccasin or Carters. Undoubted Trenton with 
Hebertella frankfortensis was seen in a bluff on the south side of the same brook 
where the Tetradium beds were seen. 
The section just described is herein somewhat differently interpreted. The 
lowest beds containing Leperditia are truly Murfreesboro limestone, but to this 
formation would be assigned the so-called Mosheim and the overlying Maclurites- 
bearing beds as well. The type Murfreesboro limestone of the Central Basin con- 
tains much black chert and also has rare Maclurites. Therefore, all these cherty 
beds, the Mosheim, and the Murfreesboro are correlated with the Murfreesboro 
limestone of the Central Basin area. 
The shaly beds containing Fascifera are thought to be Ridley (Pierce) because 
this is the only horizon for this genus in the Central Basin. The higher beds 
containing Mimella and rare Doleroides suggesting Lebanon probably also be- 
long to the Ridley. These beds, like those below, have the lithology of the Pierce 
and suggest that the characteristic massive Ridley limestone of the Central Basin 
is represented eastward by shalier beds. In addition to Mimella, which occurs 
only in the Pierce in the Central Basin, Ancistrorhyncha, a common Ridley fossil, 
is frequent in the lower layers of the quarry mentioned above. The Sowerbyella 
beds are quite characteristic of the Lebanon. This brachiopod is characteristic 
of the Lebanon in the Central Basin and is extremely rare in any of the Stones 
River beds outside the Lebanon. The Tetradium beds are thought to be Carters. 
In Alabama, in the belts west of the Cahaba Coal Field area, the name ‘“‘Chicka- 
mauga limestone” has been used in the maps of the U. S. Geological Survey 
(Birmingham, Bessemer). As in Georgia, the name really is not that of a 
formation, but is a group term embracing several distinguishable formations. Ac- 
cording to Butts (1927, p. 7) fossils taken from the Chickamauga limestones of 
Alabama were identified by Ulrich, who recognized in them representatives of 
the Stones River group, Black River (Lowville) limestone, and Trenton lime- 
stone. In these identifications Butts and Ulrich appear to be mistaken. It is be- 
lieved by the present writer that the so-called Stones River and Black River 
limestones actually represent part of the true Stones River and the Carters lime- 
stones of the Central Basin sequence. The overlying Trenton limestones can 
also be related to Trenton strata of the same region. In the quarry at Gate City, 
Leeds (15’) Quadrangle, fossiliferous limestones containing representatives of 
the Lebanon and Carters formation are overlain by Trenton (Curdsville). 
In the Birmingham and Bessemer quadrangles, the Chickamauga limestone 
is marked by a basal conglomerate, the Attalla conglomerate, 20 to 40 feet thick 
and containing angular to subrounded pebbles of chert. The rock varies from a 
coarse sand to a coarse conglomerate. In places, as at Foster Mountain, the 
lower part of the “formation” (about 25 feet) is composed of shale often mottled 
or streaked with purple and containing a medium-sized Lingulella (L. foster- 
montensis (Butts) ) and suggesting the Blackford formation. 
