<span>The earth contains a huge amount of liquid or hot rock at a relatively short distance from the surface. Some of it is welling up now at various points in the world. Hot springs are the result of water seeping into the heated rocks and coming back up hot. In a geothermal power plant water is piped down to the hot area and the returning boiling water is used to produce electricity. It is a fact that lava up welling in the mid-Atlantic is moving Europe and America apart. That is a large amount of geothermal energy at work.</span>
The principle of which relative dating can be used at Siccar Point in Scotland to determine that the rocks below the unconformity were tilted to vertical before erosion occurred is the o<span>riginal horizontality. Thank you for posting your question here. I hope the answer helps. </span>
The mid-ocean ridges are elevated above the surrounding seafloor because Ridge rocks are hot and therefore of relatively less dense than adjacent cooler oceanic crust.
