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The 'Karoo and Farrar provinces' together comprise a major flood basalt province of the which is found in both South Africa and Antarctica. It formed just prior to the breakup of Gondwana about 183 million years ago; this timing corresponds to the Pliensbachian-Toarcian extinction. The total original volume of the flow, which extends over a distance in excess of 6000 km (4000 km in Antartica alone), was in excess of 2.5 x 10⁶ km³.^[1]

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References

References

1. Sur l'âge des trapps basaltiques (On the ages of flood basalt events); Vincent E. Courtillota & Paul R. Renneb; Comptes Rendus Geoscience; Vol: 335 Issue: 1, January, 2003; pp: 113-140