#erosion

• Ablation — A non-medical process of removal, reduction, or melting of material from the surface of a solid body through mechanical, thermal, or climatic actions. In glaciology, it represents the total loss of ice or snow from a glacier through melting, evaporation, or sublimation; in astronomy and aeronautics, it denotes the erosion of the protective layer of a meteorite or spacecraft entering the atmosphere due to intense thermal friction.
• Geological ablation — A conceptual form or terminological variant of 'ablație', used in classical geomorphology to describe the phenomenon of removal, washing away, or baring of rocks under the action of external agents (wind, flowing waters, waves). In soil dynamics, the term emphasizes the initial transport phase of fine detrital materials before they are deposited in sedimentary basins.
• Abrasion — A complex process of mechanical wearing down, erosion, grinding, or polishing of a solid surface (rocks, metals, industrial materials) through repeated friction with hard particles or abrasive bodies; (in geology) the destructive erosive action on sea or large lake shores exerted by the violent movement of waves and transported debris; (in medicine/dentistry) progressive pathological loss of hard dental substance or skin tissue (superficial scratch, graze) caused by external mechanical frictional factors.
• Adamantolysis — A pathological or experimental process of destruction, dissolution, or structural disintegration of dental enamel, caused by the action of acids, bacterial enzymes, or severe metabolic disorders. This phenomenon leads to the demineralization of the enamel prism and the loss of tooth surface integrity, being the first stage in the development of deep carious lesions.
• Outcrop — Part of a geological formation, rock layer, or mineral deposit that appears directly at the Earth's surface, exposed from soil or vegetation due to erosion or excavation. In field research, these structures represent primary points of direct observation for geologists, allowing the analysis of the crust's structure without deep drilling.
• Washing away — The act of washing away or eroding and its result; an archaic or regional term describing the process of erosion, washing out, or structural digging of riverbanks under the action of hydraulic currents. This natural physical phenomenon gradually modifies the riparian relief, historically used by locals to explain the loss of arable land near rivers.
• Scour — The act of scouring and its result; a hydrodynamic phenomenon of local erosion, washing away, and excavation of a riverbed or soil at the base of a hydraulic structure, such as bridge piers or dikes, under the direct action of strong currents. This structural process can jeopardize the stability of the entire foundation if consolidation measures are not applied.
• Alpine bentgrass — A species of perennial herbaceous plants within the genus Agrostis, family Poaceae, structurally adapted to high mountain and alpine climates. This grass grows in small, dense tufts on alpine meadows, rocky ridges, or screes, playing a crucial ecological role in preventing soil erosion in high-altitude zones and serving as forage for wild alpine fauna.
• Agricultural terrace — An artificial terrace constructed on steep hillsides or mountain slopes through specific land leveling and soil stabilization works for agricultural purposes and crop cultivation (vineyards, fruit trees, rice). This anthropic structure reduces water runoff velocity, prevents surface soil erosion, retains soil moisture, and allows for the partial mechanization of field operations on sloped lands.
• Aeolian corrasion — A geomorphological process of disintegration, fragmentation, and structural destruction of rocks under the direct and prolonged action of wind laden with abrasive sand or dust particles; natural aeolian corrasion or sandblasting.
• Anerosion — A rare form of evolutionary development or structural micro-relief characterized by the total absence or severe diminution of normal fluid or eolian erosion processes within a specific area. This static geological phenomenon is caused by the presence of extremely hard rocks or compact protective layers that block degradation and maintain the original landforms intact.
• Arenogenesis — The structural geological process of sand formation and accumulation through the mechanical disintegration, chemical weathering, and erosion of preexisting rocks (especially those rich in quartz, such as granite), followed by the transport and deposition of granular particles by external agents (wind, water, waves). Arenogenesis represents a fundamental stage in the lithogenetic cycle, determining the creation of detrital deposits that, through subsequent diagenesis, can structurally evolve into sandstones or other psammitic sedimentary rocks.
• Arenogenic — Generating, producing, or favoring the formation of sand or sandy detrital deposits; relating to geological or morphological processes that lead to the fragmentation of siliceous rocks and the accumulation of quartz grains. In a structural-geological sense, an arenogenic factor directly determines the sedimentary dynamics of continental or coastal basins, influencing the granulometry of forming clastic layers.
• Arroyo — A geographical term of Hispanic origin utilized internationally to designate the dry, deep, and steep bed of a stream or torrent located in an arid or semi-arid region, which rapidly floods with water only after short, violent rainstorms. The phenomenon is characteristic of desert or steppe landscapes, frequently causing flash floods and intense linear soil erosion.
• Arștioagă — A rare regional or microtoponymic term used in certain mountain rural communities to designate a narrow valley, an abandoned stream bed, or a deep ravine structurally formed by erosion caused by water torrents during heavy rains. The word is preserved in the local pastoral vocabulary to describe terrain accidents dangerous for flock movement.
• Badlands — A type of heavily eroded terrain characterized by steep slopes, minimal vegetation, sharp ridges, and deep ravines, formed in arid or semi-arid regions by the torrential erosion of soft, clay-rich sedimentary rocks.