MINERALS 
93 
and cavities in the rock. Calcite was the first and the 
last mineral to be deposited in these cavities. The 
earlier deposit is in granular form, the later in distinct 
crystals, some of them half an inch in length, showing 
combinations of the forms M(z{.o4i), f (0221), and L(o887); 
the first two have bright reflecting planes but the negative 
rhombohedron (L) forms a somewhat rounded, dull ter¬ 
mination. Stilbite forms drusy coatings of characteristic 
platy crystals, showing the ordinary forms. The laumon- 
tite, which is the most abundant mineral, is in fibrous 
masses or single acicular crystals of pale pink color, 
showing square cross-section and an inclined terminal 
plane where they project into an open cavity. The crystals 
are not measurable, but the mineral was certainly deter¬ 
mined by its crumbling character, its form and its chemical 
behavior. 
In describing the syenite-porphyry of Stepovak Bay 
(page 82), mention was made of small cavities filled 
with epidote. The crystals are minute but they are 
sharply formed and prove to be measurable. The follow¬ 
ing forms are found: c(ooi), b(oio), a(ioo), e(ioi), 
i(io2), r(ioi), 0(011), n(m), and y(2ii). The crystals 
are prismatic parallel to the axis b, and are terminated by 
a broad plane of b with extremely narrow faces of o, n, 
and y about it. 
In another phase of this porphyry the amygdules are 
filled with finely fibrous laumontite and a core of calcite, 
and in one of the cavities the calcite forms a distinct 
and measurable crystal, a combination of M^oqi) and 
f(0221) with rather rounded faces of the scalenohedron 
^(5382). 
In the following catalogue of the minerals found by the 
Harriman Expedition, rock-forming minerals are excluded 
except in one or two cases where the mineral was unusual 
or of eminent size or striking character. 
