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Encyclopedia > Ur (continent)

Ur is the name of the first known continent that probably formed 3 billion years ago in the early Archean Eon. Ur joined with the continents Nena and Atlantica about one billion years ago to form the supercontinent Rodinia. Ur survived for a long time, until it was first torn apart when the supercontinent Pangaea broke apart about 208 million years ago into Laurasia and Gondwana. It now forms parts of Africa, Australia, India, and Madagascar. In the early period of its existence, it was probably the only continent on Earth, and is so considered by some to be a supercontinent, even though it was probably smaller than Australia is now. The Archean is a geologic eon; it is a somewhat antiquated term for the time span between 2500 million years before the present and 3800 million years before the present. ... In general usage, an eon (sometimes spelled æon) is an arbitrarily designated period of time. ... Nena was an ancient minor supercontinent. ... Atlantica was an ancient continent. ... In geology, Rodinia (from the Russian родина, or motherland) refers to one of the oldest known supercontinents, which contained most or all of Earths then-current landmass. ... For other uses, see Pangaea (disambiguation). ... Laurasia was a supercontinent that most recently existed as a part of the split of the Pangaean supercontinent in the late Mesozoic era. ... For other uses of Gondwana and Gondwanaland, see Gondwana (disambiguation). ... A world map showing the continent of Africa Africa is the worlds second-largest and second most-populous continent, after Asia. ... In geology, a supercontinent is a land mass comprising more than one continental core, or craton. ...


History of Ur

  • ~3 billion years ago, Ur formed as the only continent on Earth.
  • ~1 billion years ago, Ur was a part of the major supercontinent Rodinia.
  • ~300 million years ago, Ur was a part of the major supercontinent Pangea.
  • ~208 million years ago, Ur was torn apart into parts of Laurasia and Gondwana.
  • ~65 million years ago, the African part of Ur was torn apart as part of India.
  • ~Present, Ur is part of Australia and Madagascar.

Animated, colour-coded map showing the various continents. ... This article is about Earth as a planet. ... In geology, Rodinia (from the Russian родина, or motherland) refers to one of the oldest known supercontinents, which contained most or all of Earths then-current landmass. ... Pangea may refer to: a common alternative spelling of the name Pangaea given to the supercontinent that is believed to have existed during the Paleozoic and Mesozoic eras Pangea, a geology equipment supplier/developer of mineralogical testing equipment Pangea (cable system), a submarine telecommunications cable system connecting the Netherlands and... Laurasia was a supercontinent that most recently existed as a part of the split of the Pangaean supercontinent in the late Mesozoic era. ... For other uses of Gondwana and Gondwanaland, see Gondwana (disambiguation). ... A world map showing the continent of Africa Africa is the worlds second-largest and second most-populous continent, after Asia. ...

External links

  • In the beginning, there was Ur

  Results from FactBites:
 
Ur - Search Results - MSN Encarta (209 words)
Ur (biblical, Ur of the Chaldees), ancient city of Mesopotamia.
UR, Ur, or ur can refer to several things: *The City of Ur *UR Holding *Úr (letter) of the Ogham alphabet *Ur (rune) ᚢ of the runic alphabets *Royal Game of Ur *Ur, the first known continent *Ur...
Ur- or ur- is an English prefix derivative of Old High German, that when combined with another noun usually retains the hyphen, and means "original", "primative" or "original version".
Ur (continent) - Wikipedia, the free encyclopedia (144 words)
Ur is the name of the first known continent that probably formed 3 billion years ago in the early Archean Eon.
Ur joined with the continents Nena and Atlantica about one billion years ago to form the supercontinent Rodinia.
In the early period of its existence, it was probably the only continent on Earth, and is so considered by some to be a supercontinent, even though it was probably smaller than Australia is now.
  More results at FactBites »

 
 

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