-
Picrite basalt or
picrobasalt is a
variety of high-magnesium
olivine basalt that is very rich in the
mineral olivine. It is dark with yellow-green olivine...
- The
tholeiitic magma series (/ˌθoʊleɪˈɪtɪk/) is one of two main
magma series in
subalkaline igneous rocks, the
other being the calc-alkaline series. A...
- Ma,
placing them in the
Cretaceous period.
Their composition includes picrite pillows at the base,
followed by
tholeiitic lavas, then hyaloclastites...
-
Examples of lava
compositions (wt%)
Component Nephelinite Tholeiitic picrite Tholeiitic basalt Andesite Rhyolite SiO2 39.7 46.4 53.8 60.0 73.2 TiO2 2...
- melting, as much as 15% to 30%. High-magnesium magmas, such as
komatiite and
picrite, may also be the
products of a high
degree of
partial melting of mantle...
- The
Prospect dolerite intrusion, or
Prospect intrusion, is a Jur****ic
picrite or
dolerite laccolith that is
situated in Sydney, New
South Wales, Australia...
- rocks, with
phenocryst species used as a prefix, e.g. "olivine-bearing
picrite" or "orthoclase-phyric rhyolite".[citation needed] The IUGS recommends...
-
fallback – A
volcanic rock with a
composition between phonolite and
tephrite Picrite –
Variety of high-magnesium
basalt that is very rich in the
mineral olivinePages...
-
produce more
decay heat.
Lower temperature mantle melts such as
basalt and
picrite have
essentially replaced komatiites as an
eruptive lava on the Earth's...
- ISBN 978-0-521-38083-6. Wilshire, H.G. (1967) The
Prospect Alkaline Diabase-
Picrite Intrusion New
South Wales, Australia.
Journal of
Petrology 8(1) pp.97-163...
