Posted on 03/18/2018 6:36:56 PM PDT by SunkenCiv
In such a scenario, scientists expect that about a fifth of the Moon's material would have come from Earth and the rest from the impacting body. The Moon, our planet's constant companion for some 4.5 billion years, may have been forged by a rash of smaller bodies smashing into an embryonic Earth, researchers have revealed. A bombardment birth would explain a major inconsistency in the prevailing hypothesis that the Moon splintered off in a single, giant impact between Earth and a Mars-sized celestial body. In such a scenario, scientists expect that about a fifth of the Moon's material would have come from Earth and the rest from the impacting body. Multiple hits would have excavated more Earth material than a single one, which means the moonlets would more closely resemble our planet's composition, said the study authors. Yet, the makeup of the Earth and the Moon are near identical -- an improbability that has long perplexed backers of the single-impact hypothesis... Every collision would have formed a disk of debris around the proto-Earth which would, in turn, clump together to form a 'moonlet', they found. Around 20 moonlets would eventually coalesce to form the Moon.
(Excerpt) Read more at dailymail.co.uk ...
You’re correct, it’s compound. And it is the most abundant. It’s everywhere.
Only on the surface. The 10 most abundant elements on earth: https://education.jlab.org/glossary/abund_ele.html Hydrogen comes in at number 10 with 0.14%. While Oxygen is number 1 at 46.1%. Since water is H2O water is way down there on the abundance list.
Water its just less dense than most of the things the earth is made of and floats to the surface.
If you point your finger straight down, from anywhere you sit, the center of the earth is 4000 miles in that direction.
ALL of the water on earth is in the top few miles of that, the rest is rock, and maybe a molten iron core.
As you may have noticed, rock is more dense than water. Now, on geologic and cosmologic time scales, rock is actually fluid, which is why planets (and the moon) are spherical. If the rock could not flow they would be quite lumpy.
In the high pressures and temperatures the rock is a fluid that is more dense than water, so the water floats to the top. This is just like oil or gasoline floating on water.
The rock under the pine barrens is porous and the water is in the pores. There is not a vast underground lake like Lake Superior under your feet in some kind of cavern. Four trillion gallons of water is like someone passing gas in a tornado compared to the mass of the earth.
Not according to the experts here.
Cool theory.
One of many “Theories”....and that is all it is!!!
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