1st2know wrote on 06/07/18 at 20:33:03:raydawg wrote on 06/07/18 at 15:41:34:Yes JOG, but all the upheaved mass came from below, that is creating a bigger island, what is filling in the void left by that?
The Pacific plate is moving towards the Mariana trench between The Philippines and Japan. Hawaii is over a hot spot of magma. This hot spot stays put, as it's below the moving Pacific plate. It's been there for millions of years.
So, as the plate crosses the hot spot, lava spews up to create the islands, and then as the islands move closer to the Mariana trench, they sink back down in to the ocean. This is why the islands get smaller and smaller the further northwest you go. You'll also notice that the volcanic activity is on the south east side of the island, this would be the part of the hot spot above sea level. The hottest part is just a few miles southeast of the island.
Eventually the island of Hawaii will pass this hot spot and stop growing, and start sinking back in to the ocean, and a new island will get pushed up by this hot spot.
So, there is no void, the lava coming up will sink back down in to the crust, and then be consumed by the big cauldron that the Mariana trench is.
(I got all this from watching Nova, back when it was still a good show).
WOW, that is cool, so in effect, like water, it is finite on our planet, yet it is cyclical, in the way the earth uses it, falls, evaporation, waterways, etc.
The earth is moving its mass around too, creating, then reclaiming, etc...
AMAZING!