الموضوع: اريد ترجمة بعض الفقرات العلمية

Mineralogy of Terrigenous Sand:
A – Light Minerals:
The recorded light minerals consist mainly of quartz forming up to 85%, feldspars about 5% while
muscovite forming up to 10 % of the light minerals. The majority of the quartz grains are angular to subangular
grains, monocrystalline exhibiting non undulatory extinction. The grains are varying from transparent to
mottled, most of the grains are medium to coarse grain size coated with thin film of brown iron oxides.
Feldspars are represented mainly by potassic feldspars. Fresh and altered grains of plagioclase feldspars are
recorded in small amounts showing polysynthetic twinning. The potash feldspars are represented mainly by
irregular rectangular grains of microcline, characterized by cross hatch twinning. Few grains of altered
orthoclase are also recorded. Muscovite occurs mainly as very finely comminuted flakes and shreds with its
characteristic high order interference color between cross nicols.

كريمة احب اللهGoogle إجابات-اللغة الإنجليزية-اللغات-المواقع والبرامج-الكمبيوتر والإنترنت


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