Or at least start to crack etc... I've never actually seen one pop out of the ground. BUt have seen a couple that cracked from the pressure below them.
Retiree, for a small fee, I will stay in your house, swim in your pool, run the pump & filter system, clean the pool, and report to you on a daily basis!!!!
I'll also sleep in your bed, and eat your food!
"DEAL"?????????????????
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Hydrostatic pressure.
hydrostatic pressure (hī′drə-stăt′ĭk)
The pressure exerted by a fluid at equilibrium at a given point within the fluid, due to the force of gravity. Hydrostatic pressure increases in proportion to depth measured from the surface because of the increasing weight of fluid exerting downward force from above.