研究人员通过分析花岗岩样本中的放射性同位素，发现了此前未知的冈瓦纳大陆隐藏部分1。这一发现将该大陆的面积扩大至约80%1，达到超大陆的标准（75%以上），从而确认冈瓦纳确实是一个真正的超大陆1。
冈瓦纳形成后，其周围形成了长约35,000公里的火山弧链1。这些火山弧在7.5亿至5.5亿年前的活动期间释放了大量火山气体1，在5000万年间将地球气候从冰室期转变为温室期1。这一气候变化成为了5.5至5亿年前寒武纪生命爆发的催化剂1。
Researchers have identified previously hidden portions of the Gondwana supercontinent, expanding its continental coverage to approximately 80 percent and definitively establishing its status as a true supercontinent 1. By analyzing radioactive isotopes in granite samples collected from regions including India, Southeast Asia, China, and Kazakhstan, scientists led by Bill Collins uncovered the continent's full extent, surpassing the 75 percent threshold required for supercontinent classification 1.
The discovery revealed that a volcanic arc chain approximately 35,000 kilometers long formed around Gondwana's periphery between 750 million and 550 million years ago 1. This extensive volcanic system played a crucial role in reshaping Earth's climate over a span of 50 million years, transitioning the planet from an icehouse state to a greenhouse state 1. The massive release of volcanic gases during this period created environmental conditions that fostered the Cambrian explosion—the rapid diversification of life forms that occurred between 550 and 500 million years ago 1.
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