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Three of the deposits could be less than 100 million years old and one particular patch called Ina might even be 30-50 million years old. Dinosaurs roamed Earth between 66 - 231 million years ago when the dark areas were likely erupting bright, red lava. This also means that the moon has cooled down more slowly than expected and might explain why Apollo 15 and 27 mission temperature measurements on thermometers buried in the moon's regolith at two different sites had higher heat flow than the average moon.
The best-known IMP, called Ina (or Ina-D), was originally spotted in Apollo 15 orbital photography, and was unlike anything else previously discovered on the lunar surface. Beginning with Apollo era investigations, Ina was interpreted as a collapsed caldera at the summit of a low-shield volcano. Previous interpretations of impact crater densities within and around Ina suggested that this enigmatic landform was much younger than the surrounding mare basalt unit in Lacus Felicitatis (Lake of Happiness).
Not only does the NAC provide excellent resolution, but after 5 years of operation has covered well over 75% of the surface. This combination led to the discovery of many new IMPs in locations across the nearside of the Moon. Ina is not simply a one-off oddity – but rather a signature of volcanic processes that actually occurred in multiple places across the nearside.
originally posted by: proob4
Hmm I always thought the moon was a remnant of something that hit earth and caused the extinction of the dinosaurs.
I also thought that before the universe really started to expand Mars was could have been real close to earth that it might have bumped the earth at some point causing our moon and the moons around mars that is what created the great scar on mars? Just a thought?
originally posted by: theantediluvian
originally posted by: proob4
Hmm I always thought the moon was a remnant of something that hit earth and caused the extinction of the dinosaurs.
The prevailing hypothesis is the Giant Impact Hypothesis which holds that about 4.5 billion years ago a Mars-sized planet, usually referred to as Theia, collided with the Earth and the moon was formed from the resulting debris.
As for the comments about asteroid/meteoroid impacts on the Moon causing an outflow of magma. I don't know! But I do know that until only very recently, it was assumed that the Moon had cooled off too long ago for there to be any sort of tectonic processes at work. LROC has been paying huge dividends.
I also thought that before the universe really started to expand Mars was could have been real close to earth that it might have bumped the earth at some point causing our moon and the moons around mars that is what created the great scar on mars? Just a thought?
originally posted by: onequestion
But the moon used to be a planet right?
originally posted by: theantediluvian
I have no idea what "Apollo 15 and 27 mission temperature measurements", means. Apollo 15, maybe but there was no Apollo 27. Howe's not a very good source but thanks for providing a link to the paper. Apparently their model for crater formation suggests there would be more craters in the areas where they think the eruptions were within the last 100 million years, if they were as old as previously thought.
This also means that the moon has cooled down more slowly than expected and might explain why Apollo 15 and 27 mission temperature measurements on thermometers buried in the moon's regolith at two different sites had higher heat flow than the average moon.
Both may be impact related, but not the same impact with the dinosaur extinction being 65 million years ago and the moon formation over 4 billion years ago.
originally posted by: proob4
Hmm I always thought the moon was a remnant of something that hit earth and caused the extinction of the dinosaurs.
The distance between Earth and Mars wouldn't be affected to a measurable degree by the expansion of the universe. I don't know if the distance increased, decreased, or stayed the same, but if it did any of those it was unrelated to the expansion of the universe. Also there is not really any time "before the universe really started to expand", because it has really been expanding ever since the big bang.
originally posted by: proob4
I also thought that before the universe really started to expand Mars was could have been real close to earth that it might have bumped the earth at some point causing our moon and the moons around mars that is what created the great scar on mars? Just a thought?
originally posted by: Arbitrageur
I have no idea what "Apollo 15 and 27 mission temperature measurements", means. Apollo 15, maybe but there was no Apollo 27.