Recent content by jr1956

Not sure. My understanding is that the Earth was a solid first as gravity pulled all the dust and debris into a solid earth. As radioactive decay of thorium and uranium occurred, the inside heated up and melted all the material inside the earth. The heavier elements like iron began to be drawn...

Solids tend to expand when heated or when they transition to a liquid. Is this thermal expansion a factor in the earth? If the diameter/volume increases, this would cause the surface area to increase also. This would lead to cracks, rifts or faults in the crust of the earth. Could this be a...

Thank you for your answers. I had thought about the meteorite angle, but no the lithophile characteristic of Uranium. Good analogy with the salt water.

When the early Earth melted, the heavy elements were drawn to the center due to gravity. Thus we have a iron core. Why shouldn't the core also have drawn in the heavy elements like uranium? The theory says the heat energy for the melt was due to the radioactive decay Why do we still have a...