دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a sedimentary rock composed of fragments of preexisting rocks. The principal distinction among clastics is grain size. Conglomerates, sandstones, and shales are clastic rocks.

n pi: I. sediments formed by the breakdown of large rock masses by climatological processes, physical or chemical. 2. the rocks formed from these sediments.

n: I. a term used for particles smaller than \1156 millimetre (4 microns) in size, regardless of mineral composition. 2. a group of hydrous aluminum silicate minerals (clay minerals). 3. a sediment of fine clastics.

n: (1) A soft, variously colored earth, commonly hydrous silicates of alumina, formed by the decomposition of feldspar and other aluminum silicates. Clay minerals are essentially insoluble in water but disperse under hydration, grinding, or velocity effects.

a fine grain (<0.00015” or about 4 microns) – finely crystalline silica sheet minerals. Usually of silicate composition. In oil field terms, the most common clays are Smectite (montmorillinite),illite, kaolinite and chlorite. The characteristic for autho

particles (to chucks) of molten igneous rock ejected from a volcanic vent during an eruption.