Karoo-Ferrarとは 意味・読み方・使い方

Karoo and Ferrar denote a major geologic province consisting of flood basalt, which mostly covers South Africa and Antarctica, although portions extend into South America, India, Australia and New Zealand. It formed just prior to the breakup of Gondwana about 183 million years ago; this timing corresponds to the early Toarcian anoxic event and the Pliensbachian-Toarcian extinction. The total original volume of the flow, which extends over a distance in excess of 6000 km (4000 km in Antarctica alone), was in excess of 2.5 x 10⁶ km³.