PART I CHAZYAN AND RELATED BRACHIOPODS—COOPER 73 
Liberty Hall facies of Edinburg formation.—This name was used by 
Cooper and Cooper (1946, p. 78) for black graptolitic shale and black con- 
choidally fracturing limestone which interfingers with the Lantz Mills facies of 
cobbly limestone. The Liberty Hall facies is best developed on the east side of 
the Massanutten syncline and in the vicinity of Lexington and Natural Bridge, 
Va. This facies corresponds in the Lexington region to the Liberty Hall forma- 
tion of H. D. Campbell (1905, p. 445), In general, the Liberty Hall facies dis- 
appears to the northeast and is best developed to the southwest. 
The following brachiopods have been taken from the Liberty Hall facies: 
Acanthocrania spinosa Cooper Laticrura pionodema Cooper 
Camerella leiorhynchoidea Cooper Leptobolus sp. 1 
Chonetoidea virginica Cooper Leptobolus sp. 2 
Conotreta multisinuata Cooper Lingulella lirata Cooper 
Cyclospira quadrata Cooper Oxoplecia holstonensis Willard 
Ectenoglossa nymphoidea Cooper Paucicrura virginica Cooper 
Elliptoglossa ovalis Cooper Perimecocoelia semicostata Cooper 
E, rotundata Cooper Petrocrania sp. 2 
Eoplectodonta sp. 1 Phragmorthis buttsi Cooper 
Glyptambonites glyptus Cooper Ptychoglyptus virginiensis Willard 
Kullervo parva Cooper Skenidioides costatus Cooper 
Correlation of Liberty Hall facies—The black limestone interfingers with 
Lantz Mills facies. The faunal list, with its many Botetourt and Arline elements, 
shows that the lower Liberty Hall, like lower Rich Valley, contains lenses or 
fingers of limestone with Arline fossils. The Liberty Hall facies also fingers with 
beds having Wardell affinities. 
The Whitesburg formation of East Tennessee is the same type of facies as 
the Liberty Hall but seems not to have as great a stratigraphic range as the 
Liberty Hall. It seems to include Benbolt equivalents, but nothing higher was 
definitely identified. It is interesting to note that the rocks on the east side of 
the Massanutten syncline in northern Virginia are mostly of the Liberty Hall 
facies. On Opequon Creek east of Winchester fingers of Martinsburg lithology 
appear in the Liberty Hall. This suggests that eastward Martinsburg lithology 
would replace Liberty Hall if unmetamorphosed sequences were preserved. Such 
fingers also appear in the Edinburg. 
Lincolnshire formation.—This formation was named by Cooper and Prouty 
(1943, p. 863) for exposures in the quarry on Lincolnshire Branch west of Five 
Oaks, Va. It consists of dark, granular, cherty limestone ranging in thickness 
from 40 to 100 feet. The formation is widespread in Virginia and the western 
belts of East Tennessee. It is not known in the belts south of the Saltville fault. 
The formation generally overlies the Five Oaks formation or formations sub- 
jacent to the Five Oaks. It is overlain by the Ward Cove formation or its equiva- 
lents. In the Clinch Mountain and adjacent belts to the north, the Lincolnshire 
appears to be displaced entirely or in part by the Hogskin member. In these 
areas two members are recognized: Eidson cherty limestone and Hogskin shale. 
The Lincolnshire is the “Lenoir” of northern Virginia as mapped and de- 
scribed by Butts. The formation extends in a northeasterly direction nearly to the 
