662 Al EEE: 
Wy ro5: Taken at Horse Creek No. 3, 1 mi. west of Sheep 
Mountain, 125 ft. above granite and at much the same horizon as 
Wy 99. 
Description of hand specimen: Limestone, massive, light-green 
and specked with hard black grains, weathering dirty brown-red. | 
Hard, fine-grained, subvitreous luster, fractures conchoidally. 
Texture granular-fragmental. Constituents calcite 60 per cent; 
glauconite 30 per cent; quartz 10 per cent. Magnetite and zircon 
as accessories, and limonite as alteration product. 
Calcite 0.15 mm., probably due to recrystallization. 
Calcite in shell fragments as in Wy 99. Quartz grains surpris- 
ingly large, average 0.1 mm. and up to 0.5mm.; very angular. 
Glauconite in large aggregates, even 2 by 8mm.; some curved, as 
if by replacement of whole fossils; indifferently near to or remote 
from magnetite; fresh. Limonite mainly from magnetite. 
Classed: fine-grained brachiopodic trilobitic glauconite- 
limestone. 
Wy 89: Taken from massive bench on south side of Bald 
Mountain. 
Description of hand specimen: Sandstone, massive, pinkish 
buff, slightly splotched with brown, weathering dull grayish-white; 
subsoft, fine- to medium-grained, traces of shale streaks, earthy to 
subvitreous luster, brown splotches interpreted as oxidation of 
trilobite shields. Cross-bedded? Most persistent bed in the 
Cambrian below the flat pebble. 
Texture granular-fragmented. Constituents quartz 95 per cent; 
small amounts of biotite, magnetite, ilmenite, plagioclase, glauco- 
nite as accessories, and leucoxene and limonite as alteration prod- 
ucts. Cement quartz and calcite. 
Quartz averages o.15mm.; largest grain 0.3 by 0.15 mm.; 
angular, sufficiently cemented to suggest quartzite; few indications 
of secondary growth. Grains limonite-rimmed. Biotite much 
shredded. Chitinous rods. © 
Classed: fine-grained quartzite-sandstone. 
Wy 63: Same locality as Wy 58, 150 ft. above granite. 
Description of hand specimen: Limestone, massive, gray-green, 
weathering reddish-brown to gray. Subsoft, medium-grained, 
argillaceous, arenaceous, glauconitic, ferruginous. 
