Aquiclude

Aquiclude: Impermeable beds of geologic material that hinder or prevent groundwater movement.
Aquifer: An underground geological formation able to store and yield water.

Aquiclude: A geologic formation which may contain water but does not transmit it.

aquiclude
a formation which, although porous and capable of absorbing water slowly, will not transmit water fast enough to furnish an appreciable supply for a well or a spring.
alluvium ...

Aquiclude
A saturated geologic unit that is incapable of transmitting significant quantities of water under ordinary hydraulic gradients.
Aquifer ...

Aquiclude: An outdated term for a geologic layer of very low permeability located so that it forms an upper or lower boundary to a groundwater flow system. Aquitard or Confining Layer are preferred terms.

Aquiclude
A confining layer in an aquifer that is essentially impermeable to water flow.
Aquifer ...

confined groundwater Groundwater held under an aquiclude or an aquifuge, if the pressure is positive it is called artesian.
confined water
confining bed ...

See also: Sediment, Well, Contaminant, Air, Treatment