- The
chlorites are the
group of
phyllosilicate minerals common in low-grade
metamorphic rocks and in
altered igneous rocks. Greenschist,
formed by metamorphism...
- to
chlorite and mica.
Organic carbon in the rock is
converted to graphite.
Slate is
mainly composed of the
minerals quartz, illite, and
chlorite, which...
-
about 2 km (6,600 ft) thick,
consist of
Upper Proterozoic sericite and
chlorite slate and
schist that
contain minor amounts of
metavolcanic rocks, metaconglomerates...
-
primarily composed of quartz,
sericite mica, and
chlorite.
Phyllite has fine-grained mica flakes,
whereas slate has
extremely fine mica flakes, and
schist has...
- The
Bressay Stone is an
outstanding example of
Pictish art. a slab of
chlorite slate,
about 16
inches [400 mm] wide at the top,
tapering to less than a foot...
-
texture reflects a high
content of
platy minerals, such as mica, talc,
chlorite, or graphite.
These are
often interleaved with more
granular minerals,...
- east and west rock
formation converge.
Strata of mica
slate, argillaceous, and
chlorite slates, and limestones, alternate. An
extensive deposit of gray...
-
erected inside the
churchyard in 2000. It is
described as "a slab of
chlorite slate,
about 16
inches wide at the top,
tapering to less than a foot at the...
-
transparency somewhat greater than that of chalybite. It is
found in
chlorite slate at St. Gothard, also in the Zillerthal, in the Tyrol, and in Piedmont"...
-
These ****s of
greenstone are made up of
pyroxene and
plagioclase with
chlorite and
small amounts of calcite, quartz, and epidote. Many of
these ****s...
