Changes

  | isbn    = 0-89181-602-X

  | isbn    = 0-89181-602-X

}}

}}

Underpressure exists when a fluid pressure is lower than estimated from the normal hydrostatic fluid gradient for that depth at which it occurs. For this situation to exist, the fluid must be trapped within a rock unit.

Underpressure exists when a [[Normal hydrostatic pressure#Fluid pressure|fluid pressure]] is lower than estimated from the [[Normal hydrostatic pressure gradients|normal hydrostatic fluid gradient]] for that depth at which it occurs. For this situation to exist, the fluid must be trapped within a rock unit.

Underpressure can be caused by burial or heat decrease.

Underpressure can be caused by [[burial]] or [[heat]] decrease.

==Burial==

==Burial==