- dictionary.
Diabase (/ˈdaɪ.əˌbeɪs/), also
called dolerite (/ˈdɒl.əˌraɪt/) or
microgabbro, is a mafic, holocrystalline,
subvolcanic rock
equivalent to volcanic...
-
divers in the 1970s show that Helen's Reef is
predominantly composed of
microgabbro with an
equigranular (2–3 mm), holocrystalline,
subophitic texture. These...
-
gabbro are
called diabase (also
known as dolerite),
although the term
microgabbro is
often used when
extra descriptiveness is desired.
Gabbro may be extremely...
-
Carboniferous ****s of quartz-
microgabbro and the
whole island by a much more
numerous swarm of
Palaeogene age
microgabbro ****s
aligned NNW-SSE in the...
- not
exposed except along parts of its
southeastern s****. The quartz-
microgabbro of the Whin Sill
occupies the
higher ground on this
southeastern side...
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sequence including the Brewin's
Bridge microgabbro ****,
London Fields basalt sill and
Rowley Regis microgabbro lopolith. ****ociated with
these is a basaltic...
-
lighter shades of violet), and plutonic or
intusive (gray) - so dolerite/diabase/
microgabbro will have
shadings towards gray
compared to
erupted basalt....
- Siluro-Devonian
felsite ****s and by
numerous later NW-SE
aligned basalt and
microgabbro ****s
which form a part of the ‘Mull Swarm’
which is of
early Palaeogene...
-
intrusions took
place during the
early Palaeogene period and
consists of
microgabbro ****s ****igned to the
North Britain Palaeogene **** Suite. The island...
- of
Carboniferous sandstone and
limestone layers,
capped with a quartz-
microgabbro sill. The con****uous
peaks of West Lomond, and its
neighbour East Lomond...
