-
Ultramafic rocks (also
referred to as
ultrabasic rocks,
although the
terms are not
wholly equivalent) are
igneous and meta-igneous
rocks with a very low...
- Lherzolite – an
ultramafic and
ultrabasic rock that is
composed of
olivine and
pyroxenePages displaying wikidata descriptions as a
fallback – An
ultramafic rock...
- ****ociations are noted: high-alumina basalts, ultrapot****ic
igneous rocks, and
ultramafic rocks. The
basaltic occurrence of
phlogopite is in ****ociation with picrite...
- analcite, prehnite, natrolite, scolecite, chabazite, heulandite, etc.
Ultramafic tuffs are
extremely rare;
their characteristic is the
abundance of olivine...
- melt. Ideally, the
stratigraphic sequence of an
ultramafic-mafic
intrusive complex consists of
ultramafic peridotites and
pyroxenites with ****ociated chromitite...
-
metamorphic mineral derived from
ultramafic rocks along with serpentinite.
Anthophyllite is
formed by the
breakdown of talc in
ultramafic rocks in the
presence of...
-
confused with the
mineral olivenite), is an
intrusive igneous rock of
ultramafic composition and with
phaneritic (co****-grained) texture. The mineral...
-
chemical types based on
silica content: felsic, intermediate, mafic, and
ultramafic.
Felsic or
silicic lavas have a
silica content greater than 63%. They...
-
classifications exist for
igneous rock of
unusual compositions, such as
ultramafic rock or carbonatites.
Where possible,
extrusive igneous rocks are also...
- anorthosite. The QAPF
diagram is not used for all
plutonic rocks; the
ultramafic plutonic rocks are the most
important of
groups that have
separate classification...
