Origin of inert gases in 'rusty rock' 66095

The amount of trapped inert gases present in rock 66095, as well as the elemental and isotopic composition of these gases can be explained by 'contamination' of this rock - on the lunar surface - with as little as 0.2% of fines. There is no compelling evidence that these gases come from the impact of a comet or a carbonaceous meteorite on the moon, or that they represent genuine primordial lunar gas. The Ne-21 radiation age of 66095 is 1.1 plus or minus 0.5 m.y., which strongly suggests that this rock was excavated by the South Ray Crater event.