PART I CHAZYAN AND RELATED BRACHIOPODS—COOPER 105 
This list is strongly suggestive of the Lebanon formation, but it is possible 
that some Carters is represented. In addition to the above fossils the writer is 
describing Eoplectodonta foerstei which is said to have come from the Lowville. 
It is probable that it was derived from a part of the column now referred to 
the Carters. Its occurrence is in accord with the correlation of Carters with 
the Oranda. 
HIGH BRIDGE, CENTRAL KENTUCKY 
The sequence in the bluffs along the Kentucky River south of Lexington, Ky., 
was described by A. M. Miller (1905), A. C. McFarlan (1931, p. 49), and 
G. G. Huffman (1945, pp. 165-168). The “Highbridge Series” is divided into 
three formations from the bottom: Camp Nelson, Oregon, and Tyrone. 
Camp Nelson formation.—This formation consists of 315 feet of mostly 
dove-gray limestone, massively bedded in the lower 100 feet but becoming thinner 
bedded above. Important among the fossils reported from this formation is 
Cryptophragmus antiquatus (Raymond) which “forms a prominent zone (65 
feet or more) in the upper go feet.” The following brachiopods are reported: 
Ancistrorhyncha sp. = Ancistrorhyncha australis (Foerste) 
Camarotoechia plena (Hall) = Rostricellula sp. 
Chaulistomella lebanonensis Cooper 
Doleroides sp. 
Glyptorthis sp. 
Multicostella (?) sp. aff. M. platys (Billings) = Chaulistomella sp. 
Opikina eximia Cooper 
Opikina sp. cf. O. minnesotensis (N. H. Winchell) 
Opikina sp. cf. O. transitionalis (Okulitch) 
Pionodema minuscula Willard 
Pseudolingula ? sculptata Cooper 
Rostricellula compressa Cooper 
Strophomena sp. 
Zygospira lebanonensis Cooper 
Correlation of Camp Nelson formation.—The presence of Cryptophragmus 
in the upper part of the Camp Nelson formation is a clue to the correlation. This 
combined with the Wardell-Witten types of brachiopods indicates that the 
Camp Nelson is equivalent to the Ridley-Lebanon of the Central Basin. Crypto- 
phragmus occurs in the lower part of the Witten and in the middle of the 
Lebanon. The correlation is thus with the lower Witten and part of the Wardell, 
a correlation that is corroborated by Opikina and Ancistrorhyncha. Cryptophrag- 
mus occurs in the middle of the Lebanon; therefore, the correlation is with the 
lower Lebanon and probably part of the Ridley. 
The above correlation is possible but may not be the true one. Inasmuch as 
Cryptophragmus is commonly tied to the calcarenite facies, it may occur in any 
part of the formation. If this be true, the correlation of the Camp Nelson is 
more probably with Witten and Lebanon; Wardell and Ridley may or may not 
be represented. The fossils listed by Huffman and recorded above are more 
suggestive of high Lebanon than they are of any other part of the column, but 
the thickness of the Camp Nelson is far greater than that of the Lebanon. Sower- 
