I do not think humans can travel deeper than the crust because, the crust and the mantle is too thick. The crust is 600km and the mantle is 12,900km.
The oceans flow to the places where the crust is the lowest. Gravity causes them to flow downward. The mantle, below the crust, is at the same depth everywhere, so if the crust is lower, it is because it is thinner.
It melts and becomes magma.
crust from u
isostatic equilibrium
the deeper into earth crust the higher the pressure that forms metamorphic rocks
Pressure
Nobody has gone deeper than the upper part of the crust.
d
Earths crust extend deeper below the continents than below the oceans basins (or at least this is what I think).
We are living on the surface of the Earth's crust. The deeper you would go into the crust, the hotter it would get.
the weight of the rocks above you...
Earth science
The oceans flow to the places where the crust is the lowest. Gravity causes them to flow downward. The mantle, below the crust, is at the same depth everywhere, so if the crust is lower, it is because it is thinner.
temperature gets hotter
temperature gets hotter
crust deeper rock
It melts and becomes magma.