Ur (continent)
Hypothetical Archaean supercontinent from about 3.1 billion years ago / From Wikipedia, the free encyclopedia
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Ur is a hypothetical supercontinent that formed in the Archean eon around 3.1 billion years ago (Ga). In a reconstruction by Rogers, Ur is half a billion years older than Arctica and, in the early period of its existence, probably the only continent on Earth, making it a supercontinent despite probably being smaller than present-day Australia. In more recent works geologists often refer to both Ur and other proposed Archaean continental assemblages as supercratons. Ur can, nevertheless, be half a billion years younger than Vaalbara, but the concepts of these two early cratonic assemblages are incompatible.[citation needed]
Quick Facts Historical continent, Formed ...
Historical continent | |
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Formed | 3.1 Ga |
Type | Supercontinent |
Today part of |
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