gravity spring

gravity spring

[′grav·əd·ē ‚spriŋ]
(hydrology)
A spring that issues under the influence of gravity, not internal pressure.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
With a gravity spring, water-bearing rock has come to the surface, and water is forced out under gravity.