- The year is a unit of time
based on the
roughly 365¼ days
taken by the
Earth to
revolve around the Sun. The
contemporary calendar year,
based on the Gregorian...
-
Million years ago,
abbreviated as Mya, Myr (me****ear) or Ma (
megaannum), is a unit of time
equal to 1,000,000 years (i.e. 1×106 years), or approximately...
-
Megaampere (MA), a
multiple of the SI unit of
electric current, the
ampere Megaannum (Ma), one
million years Milliampere (mA), a
multiple of the SI unit of...
- Ga)
Hadean Eon (4–4.6 Ga) ka =
kiloannum (thousand
years ago); Ma =
megaannum (million
years ago); Ga =
gigaannum (billion
years ago). See also: Geologic...
-
periods are then
expressed by
using metric prefixes with the annum, such as
megaannum (Ma) or
gigaannum (Ga).[citation needed] The SI unit of
angle is the radian...
-
International Chronostratigrahpic Chart are
represented by the unit Ma (
megaannum, for 'million years'). For example, 201.4 ± 0.2 Ma, the
lower boundary...
- Ga)
Hadean Eon (4–4.6 Ga) ka =
kiloannum (thousand
years ago); Ma =
megaannum (million
years ago); Ga =
gigaannum (billion
years ago). See also: Geologic...
- Ga)
Hadean Eon (4–4.6 Ga) ka =
kiloannum (thousand
years ago); Ma =
megaannum (million
years ago); Ga =
gigaannum (billion
years ago). See also: Geologic...
- Ga)
Hadean Eon (4–4.6 Ga) ka =
kiloannum (thousand
years ago); Ma =
megaannum (million
years ago); Ga =
gigaannum (billion
years ago). See also: Geologic...
- Ga)
Hadean Eon (4–4.6 Ga) ka =
kiloannum (thousand
years ago); Ma =
megaannum (million
years ago); Ga =
gigaannum (billion
years ago). See also: Geologic...
