#argilos

• Argillite — A compact argillaceous sedimentary rock, structurally formed through the diagenesis and deep cementation of clay muds, characterized by a higher hardness than simple clay and by the absence of fissility or the ability to split into thin sheets (unlike clay shales). In a geological sense, argillite represents an intermediate stage of metamorphism between soft pelitic sedimentary rocks and crystalline clay shales.
• Argilo- — A learned combining form (prefixoid) derived from the Latin 'argilla' (clay), used in international scientific terminology to form words related to clay, loam, or silico-aluminous minerals (e.g., argillosol, argillo-arenaceous). As an autonomous form in modern granulometric classifications, it indicates a significant presence of fine pelitic particles within a specific sedimentary mixture, granting plastic and water retention properties.
• Argilloid — Having the appearance, texture, or colloidal properties of clay without being a pure clay from a mineralogical standpoint; a synthetic or natural material or aggregate that mimics the plastic structure of clay. In a geological sense, it describes partially weathered minerals or silicates that have developed a fine consistency and a temporary capacity for reversible hydration resembling clay.
• Clayey — Containing a significant amount of clay, possessing its specific properties, or structurally resembling loam; refers specifically to soils, minerals, sedimentary rocks, or sticky impermeable substrates. In pedology, it describes a heavy, compact earth with high plasticity when wet, which retains water but becomes extremely rigid and cracked during periods of drought.
• Argilotrophy — A type of nutrition or mineral ecological regime of higher plants or soil microorganisms that structurally relies on the absorption of nutrients and water stored directly within clay-humus complexes. In a pedological and physiological sense, the term describes the capacity of certain plant species to efficiently extract exchangeable cations (calcium, magnesium, potassium) bound to the crystalline lattice surfaces of silico-aluminous minerals in heavy clay soils.