One reason has to do with tectonic movement and the shifting of plates. It causes stress underground which releases in the form of earthquakes. The rises in pressure are results of the weight from the rocks and earth as it shifts. Aquifers can be another reason for pressure build up, which are composed of either water, oil, or gas.
A geyser
Low and high pressure systems. Obviously if you have a Low pressure system the barometric pressure will get low. High pressure causes the barometric pressure to rise.
Metamorphic rocks are produced by changing other rocks with temperature and pressure underground.
high to low
high air pressure is caused when the airmass cools
the air becomes dense and it sinks
Low and high pressure systems. Obviously if you have a Low pressure system the barometric pressure will get low. High pressure causes the barometric pressure to rise.
the high pressure oil pump
Metamorphic rocks are produced by changing other rocks with temperature and pressure underground.
Any force applied on it, erosion, pressure and heat from underground.
High pressure
High blood pressure
High pressure at the surface
High pressure
High cholesterol levels, and not enough exercise.
hammers, pick axes high pressure waterboring machines greathead shield
high blood pressue, glacouma
high potassium causes arrhythmias and the arrhythmias that it causes can reduce blood pressure causing someone to collapse.