WebFeb 17, 2024 · The South Pole-Aitken impact also melted rock from greater depths than the ejecta. Compositionally, this is very different from the material sprayed across the surface, with very little thorium. In turn, this suggests the upper mantle had two compositionally distinct layers at the time of the impact that were exposed in different ways. WebDec 18, 2024 · South Pole-Aitken impact melt is low-Ca pyroxene-rich and low-Th, suggesting stratification in the upper mantle at the time of formation. Plain Language Summary. Like the Earth, the Moon is layered into a crust and mantle. The Moon's layering was shaped by an early global melting event known as the “Lunar Magma Ocean.” As …
A South Pole–Aitken impact origin of the lunar ... - ResearchGate
WebDec 1, 2024 · Lunar mascon basins exist for only a range of observed diameters. We modeled the full formation of South-Pole Aitken basin using a sequential two-code … WebJun 25, 2008 · An early date for South Pole–Aitken means a broader peak in the bombardment rate, or possibly a steady rate throughout the period. A later date speaks to cataclysm. This is why the US National... do temporary teachers get holiday pay nsw
Geology of Shackleton Crater and the south pole of the Moon
WebApr 18, 2024 · The South Pole-Aitken (SPA) basin is the largest and oldest recognized impact basin on the Moon. It’s diameter is roughly 2,500 km or 1,550 miles. The moon’s circumference is just under 11,000... WebMay 24, 2024 · The South Pole-Aitken (SPA) basin on the farside of the Moon is the largest known impact structure in the solar system. It is the key area to answer several important questions about the Moon, including its internal structure and thermal evolution. We outline the geologic history of an important area (Von Kármán crater) within SPA. ... WebJan 18, 2024 · Zum Gewinn der Julius Bär Pole Position sagte der Brasilianer, dass er „nicht erwartet“ habe, dort zu landen, wo er im Qualifying war. Was aber noch überraschender ist, ist, dass dies, obwohl er einer der erfolgreichsten Fahrer der Serie war, nur seine vierte Pole in 101 Rennen war. ... Jonny Edgar schließt sich Jack Aitken bei Envision ... city of st petersburg building permit