Very interesting image, and very interesting boulder...at nearly 394 feet big, (nearly FOUR times the size of my mobile home at 90 feet long), with some appreciable Mass, and even if at 50 miles an hour...there is going to be SOME cratering, I would think... I think it was already THERE, when the "Mountain Building" after the impact occurred.... Meteor hits...goes deep...matter splays out...some molten... as WITH SOME VOLCANOES. there is an uplift of new rock, from pressure pushing up as Mass has been released from that spot..."mountain building"...this boulder, had landed where it was already...after the impact...then DURING the mountain building...rose with it... just my opinion... In Ann's Video... Meteor Crater does not have a central mountain... maybe it was just not over the right type of rock, or did not go deep enough, no hot spot. None of the projectile shots formed a mountain, though vaporized, and melted the sand. Many craters on the moon have no mountains... some of the larger ones do... my opinion, they had to go deep enough to hit some lava, or light rock, that could then rise to the surface...this is going on, on Earth. The Himalayan Mountains rise as rock and debris are sloughed off, and rinsed off the mountains... As the mass gets lighter...they rise. I don't think Tycho Crater's process was instant mountain... splash...up comes the liquid rock, and solidifies all at once, forming a mountain, then this boulder lands there... I think the process was slow lifting, and the rock WAS there.
In MY image... there are other, larger craters, and caldera with no central mountains, even very close by...there is a large crater at 5 o'clock with 2 smaller craters...one with a central mountain...so it does not have to be a "big, deep shot" to get mountain building...OR THERE IS ANOTHER PROCESS.
The Moon has always reminded me of cooking a Pancake. Bubbles rise...break, and you are left with cratering as the pancake solidifies from cooking, as it dehydrates from heat... you have a molten stage of the Moon...it bubbles...and like some Lava Tubes...they collapse...(but these are round "sink hole" areas, that become Craters and caldera)... as the surface cools, and solidifies... sometimes, there is still pressure from below to push up rock, or make rock. Also..."some" of these bubbles don't just collapse...they BLOW... POP!!! spewing material...collapsing, filling in...and some flooring, and mountain building, not always in the direct center, see my image.... Just my analogy....void where prohibited.
Unless, of course, you want to hear my OTHER theory...
MY Tycho Crater shot for the other week with my 6" Celestron Evolution, and my Zwo LP camera... this is one of my finest images ever...I think it is pretty perfect, and you can see wall details... so cool...
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