Toarcian turnover
- 托阿尔阶灭绝事件（托阿尔阶灭绝事件发生于侏罗纪早期的普林斯巴赫阶与托阿尔阶之间，约1亿8300万年前）
Toarcian turnover
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abstract:
The term Toarcian turnover, alternatively the Toarcian extinction, the Pliensbachian-Toarcian extinction, or the Early Jurassic extinction, refers to the wave of extinctions that marked the end of the Pliensbachian stage and the start of the Toarcian stage of the Early Jurassic period, c. 183 million years ago.
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