A saline seep is formed through excess water entering into the ground, which eventually raises the
water table. This movement causes the
groundwater to flow down slope and flow through
subsoil. Eventually the salt in the groundwater discharges on the soil surface. The salts gradually accumulate to form a saline seep.
See more at Wikipedia.org...
Wet areas in non-irrigated soils where soluble salts accumulate from the evaporation of the seeping water and crop or grass production is reduced or eliminated.