What comes first mieosis or mitosis​

I'm not sure there's a first exactly, but if I had to guess I'd say mitosis.

Explanation:

Meiosis produces genetically identical cells, results in diploid cells and takes place throughout an organism's lifetime; involved in asexual reproduction. Meiosis produces genetically unique cells, results in haploid cells, only happens at curtain times in an organism's life cycle; involved in sexual reproduction.

i'd say that the moon rock is about 2.2 billion years old.