It is very vesicular and the matrix is intersertal with feldspar microlites
, mainly plagioclase (Fig.
1999, Degassing and microlite
crystallization during pre-climactic events of Mt.
Other rarities occurring in the pegmatites of this area include microlite
, hambergite and rhodizite (Antandrokomby is one of the world's richest sources of this mineral).
The cocktail shakers gleam with the promise of strange and exotic drinks while the microlites
and glowing glass features blend different colours intothe decor.
Although no sulfate microlites
are present in the quartzine, these possible relic gypsum textures are similar to those occurring in Permian beds on Bear Island, Svalbard near Spitsbergen.
A reaction vessel coated with a thin layer of titanium dioxide is filled with the aqueous dye solution and the 9W UV-A lamp (a Philips PL-S9W/10 fluorescent lamp, Microlites
Scientific, Scarborough ON) is switched on once the solution reaches the desired temperature.
His wealth allows him to pursue two hobbies - flying microlites
Among the tephras, five major types of ash were distinguished from SEM images: (1) hydrothennally altered scoria lithics; (2) blocky lithic grains, with more or less equant shapes showing variable proportion of vesicles, small microlites
and signs of hydrothermal alteration; (3) non-vesicular juvenile blocky grains; (4) weakly-vesicular blocky pyroclasts; and (5) vesicular blocky grains (angular shaped)or irregularly shaped scoria grains (Fig.
The texture of the rock is porphyritic aphanitic with phenocrysts surrounded by microcrystalline matrix made of microlites
of euhedral plagioclase grains.
Euhedral to subhedral phenocrysts are embedded in an essentially vitreous groundmass with plagioclase and pyroxene microlites
The groundmass is largely intergranular with ferromagnesian microlites
occupying interstices between subhedral to anhedral plagioclase laths (Fig 3a).
SINCE he was a boy, Mr Kirk has been keen on "breaking the bonds of the earth", flying anything from hang-gliders and microlites
to old canvas aircraft.