72 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 127 
for a brownish, shaly rock left as a “rib” in quarrying operations to which Kay 
(1944, p. 10) applied the name “Hostler member of the Hatter formation.” 
Butts’ Lemont of the type section is thus part of the Nealmont, and his Lemont 
outside the type section is generally Hostler. 
Lenoir formation.—B. N. Cooper and G. A. Cooper here restrict the name 
Lenoir to the sequence exhibited at the type locality on the east side of Lenoir 
City. So restricted, the long sequence containing Christiania, originally referred 
to the Lenoir by many geologists, is excluded. The Christiania beds are now 
called Arline formation. At the type locality the Lenoir contains three zones in 
ascending order: Rostricellula zone, Valcourea-Mimella zone, and Maclurites 
zone. In the southeastern belts in Tennessee the Rostricellula zone is widespread 
but is often difficult to find. In places, such as the belt along the base of the 
Great Smoky Mountains, it occurs in sinks or small masses (the Douglas Lake 
is an example). It is often a mass of calcarenite abounding in Rostricellula and 
other fossils, as behind the Friends Church at Friendsville. 
The biggest and best development of the Lenoir is at Friendsville where each 
of the zones is well developed and fairly thick. 
To the west of the Friendsville area in Tennessee, across the strike of the 
various belts, the Lenoir changes its lithology and is ultimately cut out. In its 
changed lithology, the Lenoir appears as a calcarenite well exhibited near Tum- 
bez in Virginia with a basal conglomerate containing Rostricellula, and the mas- 
sive limestones above it contain Valcourea and Mimella. Here it has been called 
the Tumbez formation (B. N. Cooper, 1945b, p. 133). The Blackford forma- 
tion of dolomites, red beds, and conglomerates is equivalent to Tumbez and 
Lenoir. In the belt along the Cumberland Front the Lenoir is missing; the 
Blackford facies (Dot formation) there is equivalent to the Hogskin member of 
the Lincolnshire formation. 
Brachiopods identified in the restricted Lenoir are: 
Aitelelasma variabile Cooper Onychoplecia brevirostris Cooper 
Camerella triangulata Cooper Ptychopleurella glypta Cooper 
Dactylogonia alternata Cooper Rostricellula basalaris Cooper 
Dorytreta ovata Cooper R. costata Cooper 
Hesperorthis tenuicostata Cooper R. multicostata Cooper 
Macrocoelia nuclea (Butts) R. varicosta Cooper 
M. plebeia Cooper Titanambonites praecursor Cooper 
Macrocoelia sp. 1 Valcourea obscura Cooper 
Correlation of restricted Lenoir formation—The Lenoir formation as re- 
stricted contains elements of the Crown Point and Valcour formations of the 
New York sequence. The Hesperorthis is a link to the Valcour, as is Titanam- 
bonites, which ties the Lenoir to the higher beds. Onychoplecia and Valcourea 
are suggestive of the Crown Point formation. The Mimellas might relate the 
Lenoir to either of the New York formations. Actually the Lenoir fauna may 
be more like that of the Valcour than now realized because description of the 
fossils of the St. Martin formation will make available Valcour species of Dacty- 
logonia, Mimella, and other genera not now recorded from the Valcour but 
definitely present. 
