56 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
The name “Chickamauga” is no longer a useful formation name because the 
limestone can be broken into recognizable formations to which the names from 
the Central Basin may be applicable. The Chickamauga is probably not synony- 
mous with the Pelham limestone proposed by E. A. Smith a year earlier. 
Chota formation (R. B. Neuman, 1956).—This name was introduced for 
the “Sandstone lentil in the Sevier,’ described by Keith, in the belt along the 
Great Smoky Mountains in East Tennessee. The formation consists of gray 
sandstone for the most part, calcareous in places, 550 to goo feet thick. The 
Chota occurs just under a sandstone containing Dinorthis transversa Willard. 
On the basis of this occurrence the formation is placed opposite the Benbolt 
formation of western belts. 
Cliffield formation.—This name was proposed by Cooper and Prouty (1943, 
p. 862) for a succession of limestone beds which made a convenient unit for 
mapping purposes. The formation northwest of Clinch Mountain was divided 
into five members: Blackford, Five Oaks, Lincolnshire, Ward Cove, and Peery. 
Subsequent studies have shown that each of these members is best recognized 
as a formation; consequently, the brachiopods from each are listed under the 
respective names. 
Cliffield group.—Under this heading B. N. Cooper (1944, p. 54-69) groups 
rock units equivalent to the aggregate of members under the Cliffield formation. 
These are Blackford, Five Oaks, Lincolnshire, Effna, Whitesburg, Athens, and 
Peery. It will be seen from this listing that the position of the Ward Cove is 
occupied by three units, Effna, Whitesburg, and Athens, of unlike character. The 
brachiopods of these units are discussed under the Effna and Rich Valley 
formations. 
Clover member of Loysburg formation.—This is the top member of the 
Loysburg formation in central Pennsylvania. The name was proposed by Kay 
(1944, pp. 4-6) for sublithographic limestone, 40 to 80 feet thick, interfingering 
with the magnesian rock of the Loysburg formation and underlying the Hatter 
formation. The member to date has produced no brachiopods. 
Collierstown formation.—This unit was named by Cooper and Cooper 
(1946, p. 60) for Collierstown on Collier Creek, west of Lexington, Va. The 
type section is just north of Virginia State Highway 241, 2 miles east of Col- 
lierstown. This limestone consists of a maximum of 75 feet of shell limestone 
and calcarenite with minor parts of buff shale and argillaceous limestone. It is 
known only in the westernmost belt of Middle Ordovician limestone along the 
base of Little North Mountain. The limestone is crowded with a few species of 
poorly preserved brachiopods, among them Rafinesquina. 
Cyclospira sp. Rafinesquina trentonensis (Conrad) 
Doleroides sp. Zygospira sp. 
Correlation of Collierstown formation.—The Collierstown formation occupies 
the same stratigraphic position in the southern part of the Shenandoah Valley 
as the Oranda formation in northern Virginia. It also has a similar position to 
the Cane Creek formation. 
