SecoHflary Occurrences of 3Ia(/)ietite. — Kimball. 25 
iron ore at the head of Barclay sound are at an elevation of 
about 1136 feet on the slope of Broughton peak facing the 
sound. The developments, as usual, are in connection witli 
metamorphie limestone which overlies them, but they seem to be 
in part within compass of a belt of bleached and highlj' al- 
tered greenstone — somewhat epidotic in places, interposed be- 
tween the limestone and an underlying belt of quartzite more 
or less epidotic (Plate II, fig. 1). The development 6i ore 
is very irregular and far from continuous. Tlie belt within 
which it is found is gullied by erosion. Parts of the lower 
bands of the limestone have given away to replacement of 
magnetite, portions of which have sub«equently been eroded. 
A few blasts only have been put in, but enough to disclose the 
fact tliat about one-half of the oi-e development in sight is 
within compass of the limestone, and the other division within 
compass of the underlying quartzite or bleached diorite. At the 
lowest level exposed by blasting one irregular mass of ore near- 
est the underlying quartzite measures about eleven feet across. 
The whole occurrence conforms to what has above been distin- 
guished as a terminal presentation of an outcropijing edge of 
a limestone belt locally replaced with magnetite. For lack of 
solidity this replacement can hardly be described either as a 
concrete ore-body or as a lens, the replacement probably being 
superficial. Two kinds of replacement are here exhibited as 
usual, distinguished in the manner above indicated. 
Some forty feet lower, on the Hank of the mountain, a lens 
of magnetite twelve feet thick on the face, developed around 
a nucleus of unaltered marble, is exposed on the strike of the 
same belt in a lap or shelf of that material. This is of the 
nature of a replacement of limestone. (Plate III, lig. 2.) Over- 
hanging cliffs of limestone tower above the higher exposure. 
Further than as thus described no indications of ore bodies on 
the upward strike of the limestone belt seem to have been made 
out by the explorers whom I found encamped upon the mount- 
ain. What has been exhibited on Broughton peak is therefore 
scarcely of economic importance. 
Serita [Logan Claim.) On the Indian reservation, near the 
mouth of the Serita river, and about one mile from its east 
bank, a remarkable body of magnetite has been discovered on 
the face of a low hilL This development is of tiic sjinu'tyiM- 
