10:07in productionCh. 1 · When/ 10:07 · ceiling 15 min
Extinction
Permian–Triassic extinction event
2519 BC
The Great Dying wasn’t gradual — it was a 60,000-year cascade ignited by Siberia’s volcanoes.
The Permian–Triassic extinction event is the most severe known extinction, eliminating 81% of marine species and 70% of terrestrial vertebrates around 251.9 mya. Its cause is firmly tied to Siberian Traps volcanism, which altered atmospheric and ocean chemistry on a planetary scale. High-resolution dating from Meishan, China, gives it unmatched temporal precision. It does not address non-vertebrate life or resolve pulse count definitively. It changed the course of evolutionary history by ending the Paleozoic. It is essential for deep-time Earth system science — not for understanding present-day conservation.
It happened once, at a precise boundary: 251.941–251.880 mya.
2:11
How much
It killed more than any other known event: 81% of marine species, 70% of terrestrial vertebrates.
3:35
How
Siberian Traps volcanism spiked CO₂ from 400 ppm to 2,500 ppm and poisoned oceans with sulfur and acidity.
4:48
How we know
Meishan’s ash beds let scientists date it to the millennium; δ¹³C drops mark it where clocks fail.
6:21
How fast
It struck in one to three pulses — not a single blow — with the main marine die-off compressed into ≤100,000 years.
Worth your time?
Yes. See the whole thing.
4.5/ 5
What works
links volcanism to extinction via CO₂, SO₂, euxinia, and acidification
uses Meishan zircons for millennial-scale timing
employs δ¹³C as a global boundary marker
What does not
explain insect or plant extinction
quantify non-vertebrate losses
confirm exact number of pulses
See it if
stratigraphers
palaeoclimatologists
igneous petrologists
Skip it if
conservation biologists
ecologists studying living systems
policy makers
The written brief1 min read
What the species is and where it came from
It is an extinction event — not a species — occurring at the Permian–Triassic boundary, ~251.9 mya. It originated from geologically synchronous volcanic activity across Siberia.
How it works, in terms someone would actually use
It works by releasing vast quantities of CO₂ and SO₂ from flood basalt eruptions in the Siberian Traps, triggering ocean acidification, euxinia, and global warming.
What it gets right
It correctly identifies the Siberian Traps as the primary driver. It anchors the event to 251.902 mya using U–Pb zircon dates from Meishan. It ties the δ¹³C excursion to the boundary where radiometric dating fails.
What it does not
It does not explain the fate of insects, plants, fungi, or non-vertebrate terrestrial life. It does not quantify extinction in those groups. It does not resolve whether pulses were one, two, or three — only that evidence supports one to three.
What it changed
It reset terrestrial vertebrate and marine ecosystems: 70% of terrestrial vertebrates and 81% of marine species disappeared. It marked the end of the Paleozoic and start of the Mesozoic.
Who it is for, and who it is not
It is for geologists, palaeoclimatologists, and stratigraphers who work with carbon isotopes or high-resolution zircon dating. It is not for ecologists studying modern biodiversity loss, nor for conservation practitioners.
Is it worth your time
Yes — it is the only extinction event with millennial-scale resolution from U–Pb zircon dating at Meishan, China, making its timing and environmental links uniquely testable.