You asked how this supersonic steam erupting laterally out from under the granite mantle could lose its heat in the vacuums of the upper atmosphere, In the book of Revelations it talks of the atmosphere being rolled back, were talking of a whole lot of ash coming up from the cavitation of the granite and basalt rock, likely how God cause the windows of heaven(water canopy) to be opened, even today we need dust to cause a raindrop, in the formation of the 45,000 miles plus basalt under the ocean mountain range, the sediment blasted out with the waters was deposited all across the earth, from what I heard it averages over 1 mile in depth across the entire planet, as evidenced in the Grand Canyon, Hudson Canyon, Amazon Canyon, etc... with all the ash being blown up into the upper atmosphere laterally, as the super sonic steam cooled it returned to the earth as rain, snow, etc...its not all that uncommon for whitesquall, macro-down bursts, micro-down bursts when hot humid air is rising, or along along a storm front, however, think most asteroids likely consists of water, and from my point of thinking, when God caused our sun to shine only 13,000 years ago(core harmonics evidencing it a very young star), the waters on Mars, the moons, etc...because of gravity escaped too, thus I don't personally think all the water based asteroids came from the Genesis World Flood, but where the lateral blasting of water became more a vertical blast, don't see why some rocks were not launched into outer space, etc...even today they don't understand in totality what happened in the tungsla explosion in the early 1900's, but even here they feel that the atmosphere rolled back, what I feel likely happened when God caused the fountains of the deep to erupt, as we all know there is a lot of water down under the earth, filling the fractured rock, don't think Walt Brown thought up the water under the earth, its like biblical, and many scientist feel that mars has evidence it too, has waters, seas, likely water is under ground, and the oceans of water that escaped contributed to the asteroid belt. If one looks at Europa, one of the moons of our solar system, it is an icy world, meaning that the however, the planets were created in the beginning, they didn't come into being as a molten piece of rock, the reason there are scientists that believe there is more water under the oceans in the inner earth that exists within the oceans themselves. If the earth was formed as a molten piece of rock, no water should exists down below the granite mantle, challenging the perceived molten rock planet formation theory to be flawed.
GARBAGE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Helioseismology does not evidence the Sun as a young star. You are referring there to data first taken back in the early 1970's and people not understanding that data. This was in the infancy of helioseismology.
There are NO water based asteroids, period.
oops I saw the name Walt Brown in your post. Really don't need to read anything more then - he is a buffoon.