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ma in this context means "millions of years ago".

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Q: How many years ago was 146 ma?
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What does Ma mean in geology?

Ma means million years or million years ago. So and event that ocurred at 60 Ma ocurred 60 million years ago.


When did bridgewater ma become a town?

93 years ago


Which is the oldest era?

The Hadean is the oldest, it started at Earth's formation about 4.6 billion years ago (4,600 Ma), and ended roughly 3.8 billion years ago.


What era was 4 billion years ago?

Precambrian - It extends from 4.6 billion years ago to the beginning of the Cambrian Period (about 541 Ma). It includes three eons, the Hadean, Archean, and Proterozoic.


What is 15000 MYA equal to?

15000 MYA means 15000 Million Years Ago, or 15 billion years ago, longer than the approximate age of the universe (13.8 billion years). MYA can also be represented by the SI value "Ma" meaning mega-annum, so that 15000 Ma = 15 Ga (giga-annum).


What was the name of the time period 470 million years ago?

470 million years ago was in the Ordovician Period (488.3 - 443.7 Ma).Phanerozoic Eon (542 Ma - Now)Paleozoic Era (542 - 251Ma)Ordovician Period (488.3 - 443.7Ma)Middle Ordovician Epoch (471.8 - 460.9Ma)Dapingian Age (471.8 - 468.1Ma)


Did the Cambrian Period come after the Jurassic Period?

No the Cambrian Period came before the Jurassic Period.Periods in the Paleozoic Era (542 - 251 Ma) and the Mesozoic Era (251 - 65.5 Ma)Cambrian (542 - 488.3 Ma)Ordivician (488.3 - 443.7 Ma)Silurian (443.7 - 416 Ma)Devonian (416 - 359.2 Ma)Carboniferous (359.2 - 299 Ma)Permian (299 - 251 Ma)Triassic (251 - 199.6 Ma)Jurrasic (199.6 - 145.5 Ma)Cretaceous (145.5 - 65.5 Ma)


How far is Worcester MA from Providence RI?

37 miles taking ROUTE 146 - NORTH.


Where did twix candy bars come from?

the twix bar came from up ma bum holey 27 years ago xxxxxx !!!!!!!!!!!!!!!! <3 (:


How many years will it take to do b ed after MA?

one year


What does the geological term Ma mean?

Ma in geology means Mega Anum. The M is a standard SI prefix (think giga, mega, kilo, etc.), and anum means year. However, in geology the "a" specifically denotes time before the present. For example, 10 Ma means ten millions years before the present, or ten million years ago. This distinction is important because the symbol Myr is used for a million years, as well ("yr" is the abbreviation for year, similar to "s" for second or "hr" for hour). Using the "yr," however, does not denote relation to the present and instead refers to an arbitrary length of time. For example, the Triassic began about 250 Ma and ended 200 Ma, and it only lasted about 50 Myr. So it began about 250 million years ago (Ma) and lasted for fifty millions years (Myr).


Out of these 4 what would be the longest period Jurassic period carboniferous periodpaleozoic eraor mesozoic era?

The Paleozoic era is the longest out of the options given, lasting from about 541 million years ago to 252 million years ago. The Jurassic period is part of the Mesozoic era, which followed the Paleozoic era. The Carboniferous period occurred within the Paleozoic era.