"The new study represents the first time that exotic igneous rock types have been found in samples from this relatively young (two-billion-year-old) basalt region of the moon. The findings could help better model the formation of regolith in the Mons Rümker region. The discovery of exotic igneous clasts in the samples suggests there are still unknown geological regions on the moon, something that may influence the planning of future lunar missions."
I read this report a bit earlier. Exotic clasts in Chang'e-5 samples indicate unexplored terrane on moon, https://phys.org/news/2022-12-exotic-clasts-change-samples-unexplored.html
ref - Exotic clasts in Chang’e-5 regolith indicative of unexplored terrane on the Moon, https://www.nature.com/articles/s41550-022-01840-7
, 22-Dec-2022. "Abstract The 2-Gyr-old Chang’e-5 samples are the youngest lunar basaltic regolith returned to Earth and can provide information on the lithological diversity and regolith gardening processes at young mare regions on the Moon over a hitherto unexplored time window..."
My observation. This looks like the Moon underwent heavy bombardment episode(s) 2 Gyr ago. This is well into the Precambrian of Earth. Did mass extinctions of Precambrian tiny life take place on Earth and did abiogenesis need to restart creating life from non-living matter – how many times now? Impact reports like this should call into question the Darwinian doctrine that Precambrian tiny life is the common ancestor of the fossils seen in the Cambrian explosion record. Charles Darwin in the early 1880s taught that life evolved from non-living matter in a warm little pond. Charles Darwin did not know about all the Precambrian, violence and destruction we see today in the solar system, and now much younger dated, bombardment and impact episodes on the Moon by the Chinese samples.