Microlites


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Microlites

 

fine microscopic prismatic crystals of plagioclase and other rock-forming minerals that are included in or form the entire semivitreous groundmass of effusive rocks. Microlites differ from phenocrysts and crystallites, that is, the smallest nucleating crystal formations, in that they are produced during the devitrification of volcanic glass.

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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 and climbing.
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.
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.