A spring horizon or spring line is an
impervious layer of rock reaching the surface, along which
springs emerge. Since
aquifer
An aquifer is an underground layer of water-bearing material, consisting of permeability (Earth sciences), permeable or fractured rock, or of unconsolidated materials (gravel, sand, or silt). Aquifers vary greatly in their characteristics. The s ...
s and impervious
strata
In geology and related fields, a stratum (: strata) is a layer of Rock (geology), rock or sediment characterized by certain Lithology, lithologic properties or attributes that distinguish it from adjacent layers from which it is separated by v ...
often lie on top of one another in horizontal layers, adjacent contact springs often emerge at the same height along a line called the spring horizon.
[Leser, Hartmut et al. ''Wörterbuch Allgemeine Geographie'', dtv, 14th ed., Mar 2010. .]
References
Springs (hydrology)
{{Hydrology-stub