euphotic erosion platform See wave-cut platform. { ə ro¯⭈zhən plat fo˙rm } erosion ridge [HYD] One of a group of ridges on the surface of snow; formed by the
corrosive action of wind-blown snow. { ə ro¯⭈zhən rij } [GEOL] A land surface shaped by agents of erosion. { ə ro¯⭈zhən sər⭈fəs } erratic [GEOL] A rock fragment that has been transported a great distance, generally by glacier ice or floating ice, and differs from the bedrock on which it rests. { ə rad⭈ik } ertor [METEOROL] The effective (radiational) temperature of the ozone layer (region). { ər to˙r } eruption [GEOL] The ejection of solid, liquid, or gaseous material from a volcano. { i rəp⭈shən } Erzgebirgian orogeny [GEOL] Diastrophism of the early Late Carboniferous. { erts⭈ gə bər⭈jən o˙ ra¨j⭈ə⭈ne¯ } escar See esker. { es⭈kər } escarpment [GEOL] A cliff or steep slope of some extent, generally separating two level or gently sloping areas, and produced by erosion or by faulting. Also known as scarp. { ə ska¨rp⭈mənt } eschar See esker. { es⭈kər } eskar See esker. { es⭈kər } esker [GEOL] A sinuous ridge of constructional form, consisting of stratified accumulations, glacial sand, and gravel. Also known as asar; eschar; eskar; osar; serpent kame. { es⭈kər } espalier drainage See trellis drainage. { e spal⭈yər dra¯n⭈ij } establishment [OCEANOGR] The interval of time between the transit (upper or lower) of the moon and the next high water at a place. { i stab⭈lish⭈mənt } estuarine circulation [OCEANOGR] In an estuary, the outflow (seaward) of low-salinity surface water over a deeper inflowing layer of dense, high-salinity water. { es⭈chə⭈ wə re¯n sər⭈kyə¦la¯⭈shən } estuarine deposit [GEOL] A sediment deposited at the heads and floors of estuaries. { es⭈chə⭈wə re¯n də pa¨z⭈ət } estuarine environment [OCEANOGR] The physical conditions and influences of an estuary. { es⭈chə⭈wə re¯n en vı¯⭈rən⭈mənt } estuarine oceanography [OCEANOGR] The study of the chemical, physical, biological, and geological properties of estuaries. { es⭈chə⭈wə re¯n o¯⭈shə na¨g⭈rə⭈fe¯ } estuary [GEOGR] A semienclosed coastal body of water which has a free connection with the open sea and within which sea water is measurably diluted with fresh water. Also known as branching bay; drowned river mouth; firth. { es⭈chə wer⭈e¯ } etesian climate See Mediterranean climate. { ə te¯⭈zhən klı¯⭈mət } etesians [METEOROL] The prevailing northerly winds in summer in the eastern Mediterranean, and especially the Aegean Sea; basically similar to the monsoon and equivalent to the maestro of the Adriatic Sea. { ə te¯⭈zhənz } ethmolith [GEOL] A downward tapering, funnel-shaped, discordant intrusion of igneous rocks. { eth⭈mə lith } eugeosyncline [GEOL] The internal volcanic belt of an orthogeosyncline. { yu¨ je¯⭈ o¯ sin klı¯n } Eulerian nutation See Chandler wobble. { o˙i ler⭈e¯⭈ən nyu¨ ta¯⭈shən } Eulerian wind [METEOROL] A wind motion only in response to the pressure force; the cyclostrophic wind is a special case of the Eulerian wind, which is limited in its meteorological applicability to those situations in which the Coriolis effect is negligible. { o˙i ler⭈e¯⭈ən wind } eulittoral [OCEANOGR] A subdivision of the benthic division of the littoral zone of the marine environment, extending from high-tide level to about 200 feet (60 meters), the lower limit for abundant growth of attached plants. { yu¨ lid⭈ə⭈rəl } eupelagic See pelagic. { yu¨⭈pə laj⭈ik } euphotic [OCEANOGR] Of or constituting the upper levels of the marine environment down to the limits of effective light penetration for photosynthesis. { yu¨ fa¨d⭈ik } erosion surface
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