282 J. P. Kimbali—G@rahamite in the Huasteca, Mexico, 
between Chapula and Pinolco in the Capadero basin, and thence 
inferred the geological identity of these neighboring basin 
now proceed to describe the deposit of grahamite known as 
the Cristo mine.* 
The original outcrop of the deposit appeared at the base of the 
west bank of the Capadero, on’ the Cristo Ranch, near the edge 
of the river at low water, and below the surface of the water 
during the rainy season. It appears to have been long observed, 
and to have been regarded by some persons as a deposit of 
bituminous coal, and by others as chapapote, but to have re- 
mained unexplored—perhaps through some discovery of its ill 
adaptation to the ordinary purposes of either fuels or asphalts. 
In 1873, the deposit was denounced as a coal-mining property. 
The deposit consists of two continuous parts, the one occupy- 
ing a nearly vertical fissure traversing the fossiliferous shales, 
and the other part conformably overlying these shales, which 
are slightly inclined. We have here the phenomena, first, of a 
deep-seated fissure transverse to the bedding of the formation, 
and filled out with grahamite; and, second, a nearly horizontal, 
and originally superficial, deposit of the same material over 
spreading the shale formation for a limited distance from the 
fissure. The latter 0c- 
currence is an overflow 
from the fissure, and, as 
it lies between the two 
surface, .as @ Te and 
from the evaporation 
oxidation of s 
pasty malthas, issuing from sluggish Peat oe in the 
rtain stratum 
more extended sources, as from a ce atone below, are 
to be seen beyond the boundaries of the sha 
the neighborhood of the Cristo mine, and indeed are 
* J. P. Kimball on a deposit of grahamite known as the Cristo 
Plate. 24 pp. 1876. 
* 
