Abstract: The textural, mineralogical and morphological habits of 25 core samples collected from the
north east coast of the Nile delta (east of Damietta branch) have been determined. Both detrital as well
as gypsum crystals and roses samples were investigated. Texturally the detrital samples are composed
mainly of clayey sand and muddy sand. Two different morphological categories were recorded, single
crystal type of different sizes and forms as well as smaller columnar branched type. The two recorded
gypsum categories reflect two different mechanisms of formation the first one is super saturation level
with calcium sulphate, which lead to the formation of the single crystal and roses followed by
evaporative pumping mechanism which is responsible for the formation of columnar branched type.
The relatively large size of gypsum roses and crystals indicate continuity in saturated brine level for a
long period and reflecting also a state of stagnation period
كريمة احب اللهاللغة الإنجليزية-اللغات-المواقع والبرامج-العالم العربي-الكمبيوتر والإنترنت
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