Re the old argument between "gradualism" and "punctualism", the former is more likely but in a vast phase space the latter happens.
Dating The Moon
This rock was later labeled sample When we age date a planet, we are actually just dating the age of the surface, not the whole planet. Courtesy Paul Spudis The Moon's major impact basins A map of the major lunar impact basins on the nearside left and farside right. By modeling the evolution of giant impact debris over time and fitting the results to ancient impact heat signatures in stony meteorites, the team was able to infer the Moon formed about 4. So, Carbon can only measure things up to just over 50, years old, great for determining when someone built a wood fire, but not good for determining the age of a meteorite.