Clastic clay mineral material

From these mineralogical and geochemical data we may reconstruct the formations of the Upper Silurian as potential source rocks for hydrocarbons. The widespread presence of large proportions of iUitic-kaolinitic clay minerals indicates that the Silurian sedimentation took place under relative tectonic stability and that the supply of the clastic material came from a peneplaned region with humid climate resulting in a weathering zone of illito-kaolinitic composition. 

Clays are clastic sediments, i. e., they consist mainly of the remains of pre-existing rocks which have been broken down by weathering and/or erosion. The clay minerals are present in the form of very small particles (<0.002 mm) which have been deposited mainly in water — fresh, brackish or marine. Geologically the clays, along with shales, marls, etc., are classed as argillaceous rocks. The term "clay" is more especially reserved for material which has no pronounced bedding planes and which forms a plastic mass when wet. The principal constituents are the clay... 

Chelate A dissolved species, typically organic, with two or more funcHonal groups that are capable of sharing pairs of electrons with a metal caHon Clastic Material composed of pieces of pre-exisHng rocks Clay Rock or mineral with a grain size less than 4 fim (for geologists 2 /am for soil scientists), often consisHng of hydrous aluminum silicates... 

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