Differences between atmospheric pressure and liquid pressure

The difference is that liquids are nearly incompressible.

Explanation:

if we compare air-pressure (atmospheric) and liquid-pressure (fluid), then the difference is that liquids are nearly incompressible, and conforms to the shape of its container but retains a nearly constant volume independent of pressure. — while air is a compressible fluid — its density changes with pressure

(https://www.quora.com/What-is-the-difference-between-atmospheric-pressure-and-fluid-pressure)

igneous rocks also form where plates converge. the subducting plate melts as it sinks into the crust of the earth, and the melt rises into the overriding plate forming volcanoes. metamorphic rocks are formed mainly in the lithosphere, wherever there is high pressure and high temperature. -woods

not too sure thinking all accelerations are pointed down