-
Websterite is
ultramafic igneous rock, a type of
pyroxenite that has less than 5%
olivine and
roughly equal proportions of
orthopyroxene and clinopyroxene...
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Pyroxenites are
classified into clinopyroxenites, orthopyroxenites, and the
websterites which contain both
types of
pyroxenes (see
diagram below).
Closely allied...
- plagioclase-group
feldspar is
oligoclase Tuff – Rock
consolidated from
volcanic ash
Websterite –
Ultramafic and
ultrabasic rock – A type of pyroxenite,
composed of clinoproxene...
- harzburgite)
garnet inclusions have less CaO.
Eclogite and
peridotite are the two main
parental mantle rocks and
wehrlite and
websterite are
minor types....
- 1882–1948
mathematician Thomas Webster 1773–1844
geologist geologist who had
websterite, now
normally called aluminite,
named after him
Alexander Wilson 1714–1786...
- for its
aluminium content. It is also
known as
alley stone,
halite and
websterite (named
after Orcadian geologist Thomas Webster).
Aluminite is used by...
-
Benmoreite Trachybasalt Hawaiite Trachyte Troctolite Trondhjemite Tuff
Websterite Wehrlite Sedimentary rock
Argillite Arkose Banded iron
formation Breccia...
- meteorites, the shergottites.
Several types of
periodic rocks (lherzolites,
websterites and harzburgites) can be
found as
inclusions in the
basalt of tuff and...
-
Stikinia terrane. They
consist of lherzolite, harzburgite, wehrlite, dunite,
websterite and
garnet composed pyroxenite. The
highest and
lowest temperatures recorded...
- chromium-spinel lherzolite,
spinel clinopyroxenite, and rare
ferroan websterite and
spinel wehrlite.
Xenoliths do not
exist in the
older lava flows. However...
