P/T on land, then sea

Here is the timing of P/T. Permian ended, first, on the land; where Australia / South Africa record volcanic dust from the Siberian Traps. The deaths crept down to the ocean 200-600ky later.

Siberia wasn't any closer to these ancient kratons then than it is now, so its eruptions created a worldwide event, clearly.

251.9 Mya is the precise year noted; which makes little sense, so I recommend the open-access paper. This paper is more guarded. It just says, "higher" (in thickness) than Botha's 251.7 ±0.3 Mya radiation-date. So, lower in physical position therefore beforehand. But not much lower/after. Anyway Gastaldo 2015 seems overturned.