526 Cy IK, ILIEUIIEL 
part of the area a belt of rock called the Quantico slate. This slate 
locally appears to grade into siliceous mica-schist or gneiss. It is 
about three-quarters of a mile in width, and strikes northeast and 
southwest. The granite, gneiss, and schist are regarded as pre- 
Cambrian. The slates resemble the roofing slates on James River, 
which carry Lower Silurian fossils. 
Kimball’ describes the magnetite belt at Cranberry, N. C., and 
indicates the mode of development of the magnetite. The ore belt 
occurs in the crystalline schists forming Cranberry Ridge. These 
schists are mostly basic, pyroxene and amphibole prevailing. It is 
suggested that they are of Algonkian age. 
Keith? maps and describes the geology of the Knoxville quad- 
rangle of Tennessee and North Carolina, and of the Loudon 
quadrangle of Tennessee. Ocoee rocks form the mountain areas. 
From the base upward the series comprises the Wilhite slate, the 
Citico conglomerate, the Pigeon slate, the Cades conglomerate, the 
Thunderhead conglomerate, the Hazel slate, and the Clingman con- 
glomerate. 
The Wilhite slate is bluish-gray or black argillaceous slate. In its 
upper portion it becomes calcareous, and contains frequent beds of 
limestone and limestone conglomerate. The thickness is ordinarily 
from 300 to 400 feet. The Citico conglomerate is entirely siliceous, 
and varies from fine white sandstone to coarse quartz conglomerate, 
with a few thin beds of sandy shale. The Pigeon slate is mainly an 
argillaceous slate of great uniformity, occasionally banded by thin 
seams of coarser siliceous material. The thickness varies from 1300 to 
77OXO) SEE 
The Cades conglomerate, the Thunderhead conglomerate, the 
Hazel slate, and the Clingman conglomerate, are not described for the 
Loudon quadrangle. 
For the Knoxville quadrangle the Cades conglomerate consists of 
thick beds of slate, sandstone, graywacke, and conglomerate. ‘The 
*The magnetite belt of Cranberry, N. C., by J..P. KimpatLt: Am. Geol., Vol. 
20, 1897, pp- 299-312. = 
2Geol. Atlas of the U.S., Knoxville folio, No. 16, by ARTHUR KEITH: U.S., 
Geol. Sury., Washington, 1895. 
JIbid., London folio, No. 25, 1896. 
