Permian–Triassic extinction event

mass extinction event at the end of the Permian Period approximately 250 million years ago

large igneous province in Siberia

Lystrosaurus (; 'shovel lizard'; from Ancient Greek lístron 'tool for leveling or smoothing, shovel, spade, hoe') is an extinct genus of herbivorous dicynodont therapsids from the late Permian and Early Triassic epochs (around 248 million years ago). It lived in what is now Antarctica, India, China, Mongolia, European Russia and South Africa. Four to six species are currently recognized, although from the 1930s to 1970s the number of species was thought to be much higher. They ranged in size from that of a small dog to 8 feet (2.5 meters) long.

impact crater

hypothesis that climate change can trigger a release of methane buried in seabeds which leads to runaway warming

impact crater in Brazil

Bedout , or more specifically the Bedout High, is a geological and geophysical feature centered about off the northwestern coast of Australia in the Canning and overlying Roebuck basins. Although not obvious from sea floor topography, it is a roughly circular area about in diameter where older rocks have been uplifted as much as towards the surface and may mark the centre of a very large buried impact crater up to in diameter. The Bedout High was penetrated by two petroleum exploration wells (Bedout-1, Lagrange-1) in the 1970s and 1980s. It is named after nearby Bedout Island.