Mar. 1899. THE ORES OF CoLOMBIA—NICHOLS, 161 
GOLD MINING DISTRICT OF SOLEDAD. 
This appears to be a new district, as it is not to be found upon 
the maps, nor is it mentioned in any of the literature upon the subject 
which is readily accessible. It is known, however, that it is in the 
extreme northern part of Tolima, in the territory formerly tributary 
to Mariquita. The ores are auriferous quartz and pyrite, with 
argentiferous galena. These occur in quartz veins in a black talcose 
schist. The ore and wall rock appear in the specimen examined very 
like those of Tolda Fria. Associated with the schists are andesite 
and ‘‘porphyritic andesite.” From Soledad Sefior Gamba collected 
the following twelve specimens : 
‘320. Andesite from near Soledad.” 
‘© 321. Porphyritic andesite from near Soledad.”’ 
Probably an andesite with scattered coarse phenocrysts. 
*¢322. [E 1095.] Quartz and schist, gold ore from near Sole- 
dad.” 
A quartz vein varying from one-half to one inch in width, con- 
taining scattered grains of pyrite, and enclosed in a black talcose 
schist. 
‘¢ 323. Quartz and schist, gold ore from near Soledad.” 
*¢324. Galena, ore from the Tulcan mine.” 
fags. -otibpite.”* 
a0, ; <z0ld' ore.” 
ran27) + Gold ore,” 
pag. Old, ore.”? 
‘329. Quartz and pyrite, gold ore.” 
’a30, Quartz, gold ore.” 
‘¢331. Schist impregnated with pyrites.”’ 
GOLD MINING DISTRICT OF SUCRE. 
As with Soledad, Sucre, a new district, is not to be found on the 
map. It probably lies near Santana. The ores are quartz with 
arsenopyrite in slate. 
From the Sucre district Sefior Gamba collected the following 
five specimens, representing one mine: 
**332. [E 1096.] Black quartzose slate, wall rock of the Son- 
risa mine, Marulandes.”’ 
This is a hard, clean slate, with well developed cleavage. In 
quality it is an average roofing slate. 
