Myr
unit of a quantity of 1,000,000 years
In writing about prehistory, years are often grouped together in units of one million. Million years ago or megaannum may be abbreviated as mya, myr or Ma.[1]
References
change- ↑ Alden, Andrew (2019-08-17). "How to Abbreviate Millions of Years Old". Retrieved 2022-08-28.
