Daftar superbenua

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Revisi sejak 9 November 2008 02.29 oleh Dede2008 (bicara | kontrib)

Possible Future Supercontinents

Present-Day Supercontinents

  • Afro-Eurasia (~ 5 mya present-day supercontinent)
  • Amerika (~ 15 mya present-day supercontinent)
  • Eurasia (~ 60 mya present-day supercontinent)
  • Oceania (~ 90 mya present-day supercontinent)

Historical Supercontinents

  • Gondwana (~600 — ~30 juta tahun lalu)
  • Laurasia (~ 300 — ~60 juta tahun lalu)
  • Pangea (~300 — ~180 juta tahun lalu)
  • Euramerica (~300 juta tahun lalu)
  • Pannotia (~600 — ~540 juta tahun lalu)
  • Rodinia (~1.1 Ga— ~750 juta tahun lalu)
  • Columbia, also called Nuna (~1.8 — 1.5 miliar tahun lalu)
  • Nena (~1.8 Ga)
  • Kenorland (~2.7 Ga ago, Neoarchean sanukitoid cratons and new continental crust formed Kenorland. Protracted tectonic magna plume rifting occurred 2.48 to 2.45 Ga and this contributed to the Paleoproterozoic glacial events in 2.45 to 2.22 Ga. Final breakup occurred ~2.1 Ga.)
  • Ur (~3 Ga ago, Classified as the earliest known landmass. Ur, however, was probably the largest, perhaps even the only continent three billion years ago. While probably not a supercontinent, one can argue that Ur was a supercontinent for its time, even if it was smaller than Australia is today. Still, an older rock formation now located in Greenland dates back from Hadean times.)
  • Komatii Formation (3.475 Ga)
  • Vaalbara (~3.6 miliar tahun lalu)
  • Yilgarn (Zircon crystals from the Jack Hills of the Narryer Gneiss Terrane, Yilgarn craton, Western Australia and also 300 km. south point to a continental crust formation between 4.4-4.3 Ga. Evidence is the high Oxygen-18 values of 8.5 and micro-inclusions of SiO2 in these zircon crystals consistent with growth from a granitic source supracrustal material, low-temperature interactions and a liquid ocean.)

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