| EASTING | (1) The distance of a point east of the point of origin of a map or a grid. (2) The east-west component of a survey leg (or of a series of legs). East is positive, west is negative. See also Northing, Vertical. Survey & Mapping term. Ref JJ |
| ECCENTRIC | A speleothem of abnormal shape or attitude. cf Helictite. Cave - Depositional Features. Ref JJ |
| EDAPHOBITE | An animal (invertebrate) dwelling in the soil. Fauna. Ref MM |
| EFFLUX | Place of outflow for karst waters from an aquifer. Applied to a place where a cave stream emerges. See Efflux cave, Resurgence, Spring. Hydrology terms. Ref AC |
| EFFLUX CAVE | A cave entrance that has a stream flowing out of it. cf Influx cave, Inflow cave, Outflow cave, Resurgence, Spring. Cave - Kinds of. Ref MM |
| ENDEMIC | Peculiar to a country or district, and not native elsewhere. May be very limited in extent, eg to a single cave system. Biology - Flora & Fauna. Ref AC |
| ENDOGEAN | Pertaining to the biological domain immediately beneath the ground surface. ie in the soil or plant litter. cf Epigean, Hypogean. Cave - Biota. Ref JJ |
| ENDOKARSTIC | Subterranean region in karst, below the Epikarstic zone. Includes the upper area with free draining water plus the area below water table. Speleology term. Ref AC |
| ENTRANCE ZONE | The interface between surface and subterranean environments, leading into the Twilight zone. Cave - Parts of. Ref AC |
| EOLIAN | See Aeolian. Also Aeolianite. Karst - Kinds of. Ref JJ |
| EPIGEAN | Pertaining to the biological domain at the ground surface or above it. Includes streams. cf Endogean, Hypogean. Cave - Biota. Ref JJ |
| EPIKARSTIC | Of the upper layer of karstified carbonate rock in the unsaturated zone, immediately below the soil layer Speleology term. Ref AC |
| EPIPHREAS, EPIPHREATIC ZONE | The zone immediately above the permanently flooded Phreatic zone. Referring to water moving with some speed during floods that are too large for the usual conduits. Hydrology terms. Ref JJ |
| EROSION | The wearing away of bedrock or sediment by mechanical and chemical actions of all moving agents. eg rivers, wind, glaciers. Geology. Ref JJ |
| ESCARPMENT | A steep face terminating high lands abruptly, frequently of stratified rocks. Uplift is not implied. Geology. Ref MM |
| EUSTATIC | Pertaining to world-wide (simultaneous) changes of sea levels. Geology. Ref KG |
| EVAPOTRANSPIRATION | A process by which water is lost from a catchment or karst surface which includes evaporation of water from wet surfaces and from plants. Speleology term. Ref AC |
| EXHUMED KARST | Karst features reexposed by erosion from beneath former covering strata. Karst - Kinds of. Ref WM |
| EXSURGENCE | A spring fed only by percolation water, and not by sinking streams. Karst - Miscellaneous features of. Ref JJ |