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Grotto.— On this property for about 400 fect along Hardscrabble
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creck there are numerous small gash veins of quartz, pyrito,
chalcopyrite, hematite, and sphalerite with, in places, important
amounts of gold and silver. The veins cut volcanic rocks or
possibly the rock is a dense form of albite-rich diorite. Some of
the veins cross the creek, whereas others parallel it. A number,
completely exposed in the creck bed, are lonses 10 to 60 fect long
and up to 4 feet wide. Some of the veins that cross the creck
appear to be about the same size, as they can be seen to pinch out
in places and only a few are visible on both sides of the creck,
Where most abundant the lenses do not make up more than 10 per
cent of the rock. At one place in an area about 20 fect square,
numerous small stringers make up 5 to 30 per cent of the rock.
At the main workings a very irregular mineralized zone has been
found, possibly for 100 feet, along a zone exhibiting shearing.
This occurrence appears to be better defined than any other, and
though in places it widens to 3 to 4 feet, elsewhere mineralization
is absent or it is sparse. A few feet away from it is a mass of
andesine granodiorite, 75 feet long and 25 feet wide. Upstream
the granodiorite appears to underlie the zone as if cutting it
off. In an adit that follows the main zone there is a dyke of the
same granodiorite which, however, is dark grey and dense. This
dyke is believed to follow the zone partly in it and partly on
either side. The texture of the intrusive mass is medium grained
and porphyritic and suggests that the mass is small. Nevertheless
it is exposed over a considerable area and most probably cuts off
the mineral zone at no great depth.

Assay results show an unusually high silver content for

this type of deposit, in places 10 to 40 ounces; the highest silver