mya (unit)

In astronomy, geology, and paleontology, mya or "m.y.a." is an abbreviation for "million years ago". Like the related unit bya, mya is traditionally written in lower case. The deprecated ^[1] abbreviation m.yr. is still used informally to refer to remote time intervals.^[2]

Modern SI usage prefixes the suggested^[3] year (or annum) symbol "a" with a multiplier symbol such as "M" (for mega), or "G" (for giga).^[1][2]

Contents 1 Events around 1 mya 1.1 Geologic periods (Neogene) 2 See also 3 Notes

Events around 1 mya

Geologic periods (Neogene)

• Pliocene 5.3 to 1.8 mya
  • The last geomagnetic reversal was 0.78 mya^[4]
  • The (Eemian Stage) Ice Age started 0.13 mya
• Holocene started 0.01 mya

Related

• annum
• Before Present
• bya
• tya

Notes