-
richer in Na2O plus K2O
compared to SiO2.
Basanite appears early in the
alkaline magma series and
basanites are
found wherever alkaline magma is erupted...
-
border with Kazakhstan, is
noted for its colossal, open-cast
copper mine.)
Basanite is a deep velvety-black
variety of
amorphous quartz, of a
slightly tougher...
- basaltes, a
misspelling of
Latin basanites "very hard stone",
which was
imported from
Ancient Gr**** βασανίτης (
basanites), from βάσανος (basanos, "touchstone")...
- 000
years ago and
erupted picrobasalts, trachybasalts, ankaramites, and
basanites. They
reach as far as Lake
Chala and
Taveta in the
southeast and the Lengurumani...
- The
absence of
olivine distinguishes them from the
otherwise similar basanite. It's
parameters are
defined in the QAPF diagram.
Occurrences include leucite...
- hotspots.
Their silica content can
range from
ultramafic (nephelinites,
basanites and tephrites) to
felsic (trachytes). They are more
likely to be generated...
- Pitrucha, Rac****; Sena,
Salvador (2011). "The late
Oligocene Cieneguilla basanites,
Santa Fe County:
Records of
early Rio
Grande rift magmatism" (PDF). New...
- and may
contain also biotite, quartz, and orthoclase.
Andesite Basalt Basanite Dacite Felsite Phonolite Rhyolite Trachyte Le Maitre, R. W., ed. (1989)...
- and is
classified as extinct. The
volcanic rocks range from
ankaramitic basanite through tephrite to
phonolite and some have ultra-pot****ic compositions...
-
Small volcanic bomb of (black)
basanite with (green) dunite...
