Earth, moon and Mars: connected by meteorites

По поводу нахождения частициы земного вещества в камне на Луне.
https://all-geo.org/…-and-mars/
Оставлю здесь, в другой теме некому прочитать, да и утонет во флуде.

Оказывается, немалая часть выброшенного с планеты (Марс, Луна) материала, даже не разогревается до высокой температуры.

ЦитатаOne of my favourite talks was given by Jay Melosh (Purdue University)  who talked about how pieces of planets are thrown off into space and land on other planets. The most unequivocal line of evidence that this happens is the Martian Meteorites – 40 pieces of meteorite that came from Mars but ended up on earth . Dating of these samples suggests 6 ejection episodes, all within the last 20 million years. Magnetic studies suggest that at least some of these samples never reached temperatures greater than 40°C

Apart from Apollo astronauts, the only mechanism that send rock samples through space are large impacts. These are associated with large pressures and temperatures, so how do we explain these samples that were not strongly heated? Numerical modelling, if its very fine-grained, shows that rocks on or near the surface close to the impact are thrown off extremely fast, without being heated. As the shock wave radiates out from the impact site it interacts with the free surface in a process called spallation.

метеорит в метеорите

ЦитатаKatherine Joy (University of Manchester) spends her time studying rock samples from the moon. Some of these are Apollo samples, some are meteorites found on the earth. She’s already found some amazing things such as a meteorite in a meteorite. A tiny piece of rock floating around the solar system landed on the moon and got incorporated into the surface layers (the regolith). Another large chunk hit the moon and fractured the regolith sending pieces hurtling into space. One of these lunar fragments, containing the older meteorite within it, fell to the earth as a meteorite.

Оказывается "обмен метеоритами" между Землей, Луной и Марсом, (был) довольно частым явлением, в астрономических масштабах, конечно.