avoids myr and simply adds ago explicitly (or adds BP), as in: In this case, "79 Ma" means only a quantity of 79 million years, without the meaning of "79 million years ago".

Conflicts with the International System of Units and possible solutions

The abbreviation mya does not comply with the International System of Units (SI) in three respects, each of which can be attributed to one of its letters:
# (million): Neither t (in tya) nor b (in bya) are internationally recognized

1.Previous
3.Next