Secondary Occurrences of 3[a(jnetite. — KimbaU. 21 
svvump by which the nether portion is concealed, and the ele- 
vation of which is about 468 feet. (Plate II, figs. 1-2.) The 
longitudinal axis of this lens is about 250 feet, and the thick- 
ness of its upper face about 30 feet. Probably less than half 
of the original lens has been preserved from erosion. It lies 
in a lap of epidotic diorite, the replaced limestone having been 
entirely surrounded by eruptive material, contiguous portions 
of whic4«, as in the Prescott mine, have undergone alteration. 
Partially altered material of the same description is seen on 
top of the ore ledge, and cupreous stains occur in spots. Hor- 
izontal as well as vertical sections of this ore lens are distinct- 
ly crescent-shaped. It stands unbroken as first discovered. 
No nucleus of limestone is disclosed. The ore product on ex- 
posed faces is crystalline and partially disintegrated. 
About one mile still further inland and similarly situated 
at the base of the syenite scimmit baring on its flank the 
fragmentary limestone belt, is situated the Lake mine, so- 
called, also an unwrough^'ore body. (Plate II, fig. 3.) It illus- 
trates both kinds of replacement, derivations from limestone 
apparently predominating. Two belts of limestone are visible 
in cross section at the northern end — one occupying the middle 
of the ore-body, and the other forming its inner cover, their dip 
being a retreating one into the hill of which the formation is 
principally diorite. The lower limit of the ore development 
appears above the level of the swamp about one third way up 
the slope, and the top of the ore-ledge as spared by erosion 
117 feet above the same level. The hight of the ore-mass 
as preserved is accordingly about 78 feet — its length about 
200 feet, and its maximum thickness about 50 feet. 
The Texada mine nearest the Texada landing was the 
working first opened on the island, but was soon abandoned 
on account of its pyritous character. The ore-body is well 
exposed at the N. W. end of the limestone belt. It consists 
of a block of ore of which the vertical face is about 40 feet 
high and 10 feet wide, between walls of limestone and diorite. 
The extent of this replacement beyond the elevated outcroj)- 
ping end of the limestone belt has not been traced, it having 
been uncovered only at its terminal presentation in a natural 
bluff. Occasional indications of ore along the upward and in- 
land strike of the belt observed by Mr. Richardson, suggest 
