PART I CHAZYAN AND RELATED BRACHIOPODS—COOPER 93 
106) which appears on a chart. This is in the Clinton and Pearisburg troughs 
between the Lenoir below and the Holston above. It is thus in the position of 
the Lincolnshire formation. 
Surgener formation.—This name is proposed by B. N. Cooper and G. A. 
Cooper for chalky-weathering dark limestone, cherty dark limestone, gray to 
buff mudstone, and maroon mudstone that occupy an interval from about Elway 
through Peery. The name is used in southwestern Virginia and adjacent parts 
of East Tennessee. The name is taken from a small cemetery 4 mile due east of 
the section along Yellow Creek, Rose Hill (T.V.A. 161-NE) Quadrangle, but 
the type section is just east of the Hagan Switchback on the L. and N. RR., 44 
miles due north of Surgener Cemetery, Rose Hill (T.V.A. 161-NE) Quad- 
rangle. The Surgener is also well displayed at the south (blind) end of the 
Hagan Switchback. Good sections occur at Hagan, Dryden, and Yellow Branch, 
Va., and at Rose Hill and near Andersonville Dock, Tenn. At Hagan the 
sequence embraces the Poteet, Rob Camp, and Martin Creek formations of 
Miller and Brosge (1950). These names may be consulted for lists. Thin marine 
fingers in the maroon and buff mudstones near Rose Hill, Tenn., produced 
Oligorhynchia bifurcata Cooper and Plectocamara. Other brachiopods taken 
from the Surgener formation are: 
Ancistrorhyncha crassa Cooper 
Rhipidomena tenuitesta (Willard) 
Tellico formation.—This name is used for a predominantly clastic forma- 
tion occurring in the southeastern belts of the Southern Appalachians in East 
Tennessee and northern Georgia. Neuman (1956) has amplified this name to in- 
clude shales equivalent to Upper Athens, the Tellico sandstone, and lower part 
of the Sevier. In the belt along the west front of the Great Smoky Mountains 
the formation is several thousand feet thick and consists of some thick calcareous 
sandstones and sandy shales. These weather to a red or brown soil by leaching 
of the lime, and produce lines of knobs. Rocks identified as this formation are 
also developed in the belts north to Knoxville, but uncertainty exists as to their 
identification with the Tellico of the type belt along the Great Smoky Front. In 
these belts considerable hematite and marble containing numerous fossils occur 
in the formation. 
In its type belt the Tellico overlies shales (Blockhouse) with graptolites that 
are only partially equivalent to the Athens formation; the Tellico is overlain 
by shales and sandstones (Sevier) of uncertain correlation. In the belts passing 
through Friendsville and Knoxville the sands and calcarenites mistaken for 
Tellico overlie “Holston” marble (= Red Knobs) and are overlain by the Sevier 
formation. In this belt “Tellico” fossils are clearly related to those of the Arline 
formation and possibly fossils occurring as high as Benbolt. It is probable, there- 
fore, that the type Tellico is actually older than that of the belts north of Athens. 
The entire interval of shale and sandstones from the Knox to the base of the 
Sevier formation is equivalent on the basis of fossils to the interval from the 
