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The Boreal kingdom or Holarctic kingdom (Holarctis) is a floristic kingdom identified (1947) by botanist Ronald Good [1] (and later by Armen Takhtajan), which includes the temperate to Arctic portions of North America and Eurasia. Its flora is inherited from the ancient supercontinent of Laurasia.
Eurasia (/ j ʊəˈr eɪ ʒ ə / yoor-AY-zhə, also UK: /-ʃ ə /-shə) is the largest continental area on Earth, comprising all of Europe and Asia. [3] [4] According to some geographers, physiographically, Eurasia is a single supercontinent. [4]
A supercontinent cycle is the break-up of one supercontinent and the development of another, which takes place on a global scale. [4] Supercontinent cycles are not the same as the Wilson cycle, which is the opening and closing of an individual oceanic basin. The Wilson cycle rarely synchronizes with the timing of a supercontinent cycle. [1]
It postulates that the current continents formed from the breaking up of a supercontinent that formed hundreds of millions of years ago. Etymology From the 16th century the English noun continent was derived from the term continent land , meaning continuous or connected land [ 5 ] and translated from the Latin terra continens . [ 6 ]
Map of Pangaea with modern continental outlines. The supercontinent cycle is the quasi-periodic aggregation and dispersal of Earth's continental crust.There are varying opinions as to whether the amount of continental crust is increasing, decreasing, or staying about the same, but it is agreed that the Earth's crust is constantly being reconfigured.
The authors wrote that, within 250 million years, all the continents will converge to form Earth’s next supercontinent: Pangea Ultima. “A natural consequence of the creation and decay of ...
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This category is the top level for the flora of the nine botanical continents defined in the World Geographical Scheme for Recording Plant Distributions (WGSRPD). A non-WGSRPD "supercontinent" is currently also used for categorizing plant distributions: Category:Flora of Asia combines the categories Category:Flora of temperate Asia and Category ...