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Encyclopedia > Mya (unit)

In astronomy, geology, and paleontology, mya or "m.y.a." is an acronym for million years ago. This abbreviation is commonly used as a unit of time to denote length of time before the present or "B.P." (before AD 1950). Specifically, one mya is equal to 106 years ago. The popular term 'mya' is replaced in scientific literature with Ma (megaannum). Mya has more than one meaning: Mya, an R&B singer. ... A giant Hubble mosaic of the Crab Nebula, a supernova remnant Astronomy is the science of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earths atmosphere (such as auroras and cosmic background radiation). ... This article includes a list of works cited but its sources remain unclear because it lacks in-text citations. ... Paleontology, palaeontology or palæontology (from Greek: paleo, ancient; ontos, being; and λόγος, logos, knowledge) is the study of prehistoric life forms on Earth through the examination of plant and animal fossils. ... It has been suggested that this article or section be merged with Backronym and Apronym (Discuss) Acronyms and initialisms are abbreviations, such as NATO, laser, and ABC, written as the initial letter or letters of words, and pronounced on the basis of this abbreviated written form. ... The former Weights and Measures office in Middlesex, England. ... A pocket watch, a device used to tell time Look up time in Wiktionary, the free dictionary. ... The present is the time that is perceived directly, not as a recollection or a speculation. ... Before Present (BP) years are the units of time (counted backwards to the past) used to report raw radiocarbon ages and dates referenced to the BP scale origin in the year AD 1950 (identical to 1950 CE). ... A year is the time between two recurrences of an event related to the orbit of the Earth around the Sun. ... Annum is a Latin noun meaning year. ...


Like the related unit bya or "b.y.a.," ("billion years ago"), mya is traditionally written in lowercase. The common term bya is replaced in scientific literature with Ga (gigaannum). In [[hhehehe>12). ... One thousand million (1,000,000,000) is the natural number following 999,999,999 and preceding 1,000,000,001. ... Minuscule, or lower case, is the smaller form (case) of letters (in the Roman alphabet: a, b, c, ...). Originally alphabets were written entirely in majuscule (capital) letters which were spaced between well-defined upper and lower bounds. ...

Contents

Events around 1 mya:

Astronomical deep time:

  • The light we see now from the Andromeda Galaxy started 2.5 mya
  • The light we (do not) see now from the centre of the Milky Way started 0.026 mya

A giant Hubble mosaic of the Crab Nebula, a supernova remnant Astronomy is the science of celestial objects (such as stars, planets, comets, and galaxies) and phenomena that originate outside the Earths atmosphere (such as auroras and cosmic background radiation). ... M31 in a small telescope The Andromeda Galaxy (IPA: , also known as Messier 31, M31, or NGC 224; older texts often called it the Andromeda Nebula) is a spiral galaxy approximately 2. ... It has been suggested that Andromeda-Milky Way collision be merged into this article or section. ...

Geologic periods (Neogene):

This article includes a list of works cited but its sources remain unclear because it lacks in-text citations. ... A geologic period is a subdivision of geologic time that divides an era into smaller timeframes. ... Neogene Period is a unit of geologic time consisting of the Miocene, Pliocene, Pleistocene, and Holocene epochs. ... The Pliocene epoch (spelled Pleiocene in some older texts) is the period in the geologic timescale that extends from 5. ... The Brunhes-Matuyama Reversal was a geologic event approximately 780,000 years ago when the Earths magnetic field last underwent reversal. ... Two ice core temperature records; the Eemian is at a depth of about 1500-1800 meters in the lower graph The Eemian interglacial era (known as the Sangamon interglacial in North America, the Ipswichian interglacial in the UK, and the Riss-Würm interglacial in the Alps) is the second... Variations in CO2, temperature and dust from the Vostok ice core over the last 400 000 years For the animated movie, see Ice Age (movie). ... The Holocene epoch is a geological period that extends from the present day back to about 10,000 radiocarbon years, approximately 11,430 ± 130 calendar years BP (between 9560 and 9300 BC). ...

Prehistoric Paleontology:

  • Homo erectus existed from 1.8 to 0.07 mya
    • and learned to control fire from 1.5 to 0.5 mya
    • and colonized Asia from 0.5 to 0.3 mya
  • Homo sapiens separated from Neanderthal lineage 0.6 mya

It has been suggested that this article or section be merged with Prehistoric man. ... Paleontology, palaeontology or palæontology (from Greek: paleo, ancient; ontos, being; and λόγος, logos, knowledge) is the study of prehistoric life forms on Earth through the examination of plant and animal fossils. ... Binomial name †Homo erectus (Dubois, 1892) Synonyms † Pithecanthropus erectus † Sinanthropus pekinensis † Javanthropus soloensis † Meganthropus paleojavanicus Homo erectus (Latin: upright man) is an extinct species of the genus Homo. ... A forest fire Fire is a rapid oxidation process that creates light, heat, smoke, frost, and releases energy in varying intensities. ... World map showing the location of Asia. ... Homo sapiens (Latin: wise man) is the scientific name for the human species. ... A world map showing the continent of Africa Africa is the worlds second-largest and second most-populous continent, after Asia. ... Australasia Australasia is a term variably used to describe a region of Oceania: Australia, New Zealand, and neighbouring islands in the Pacific Ocean. ... Eurasia African-Eurasian aspect of Earth Eurasia is the Earths largest landmass covering about 21215121321km² compared with the Americas (approximately 42,000,000 km²), Africa (approximately 30,000,000 km²), and Antarctica (approximately 13,000,000 km²). Eurasia comprises the traditional continents of Europe and Asia. ... The word culture comes from the Latin root colere (to inhabit, to cultivate, or to honor). ... The Upper Paleolithic (or Upper Palaeolithic) is the third and last subdivision of the Paleolithic or Old Stone Age as it is understood in Europe, Africa and Asia. ...

See also


  Results from FactBites:
 
Mya (unit) - Wikipedia, the free encyclopedia (276 words)
In astronomy, geology, and paleontology, mya is an acronym for million years ago and is used as a unit of time to denote length of time before the present.
Like the related unit bya ("billion years ago"), mya is traditionally written in lowercase.
This is different from the related unit Gya, which capitalizes the first letter.
CT DEP: Bedrock Geology Metadata (5946 words)
For a stratigraphic correlation of bedrock units, major regional and statewide tectonic structures, and cross sectional views of the State's geology, please refer to the 1:125,000 scale Bedrock Geological Map of Connecticut.
Polygon Attributes - The bedrock polygon attribute UNIT represents the map unit symbol for bedrock geology polygons.
SYMBOL is a numeric field used to symbolize bedrock units, AGE denotes the geologic age of the mapping unit, and TIME explains the range of dates for the geologic time period associated with the geologic age.
  More results at FactBites »

 
 

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