I'm a YEC. Challenge me.

[John V]

Other methods? You mean other radiometric clocks?

For the most part, yes. Did you see the chart? It gives a few based on "cosmic ray" method which I'm not familiar with, but aside from that the other ages are radiometric using other elements.

If so, then A) there are not many options for lunar material because of its mineral composition. Making the K-Ar system the best suited and

Funny, the link Exlax gave says that K-Ar is less suitable than the other methods.

B) the other radiometric clocks are reset by heat too. Meaning that if I have a rock with the K-Ar system and the U-Th-Pb system and I heat them up, they will all 3 reset (there are 2 isotopes of U with different decay rates and this act as 2 different systems). Pb-loss for U-Th-Pb and Ar40 loss for K-Ar.

I understand Ar, as a gas, escaping when heated, but don't see it for the others. But, if you're right, then all methods should give the same date - that of the last heating. They give different dates.