Permtriász

Permtriász is a term used in geology to refer to the Permian-Triassic boundary, a period of immense geological and biological change that occurred approximately 252 million years ago. This boundary marks the end of the Permian period and the beginning of the Triassic period. It is characterized by the most severe mass extinction event in Earth's history, often referred to as the "Great Dying." During this event, an estimated 96% of all marine species and 70% of terrestrial vertebrate species perished. The causes of this extinction are still debated among scientists, but leading theories involve massive volcanic activity, specifically the Siberian Traps eruptions, which released enormous amounts of greenhouse gases, leading to rapid global warming, ocean acidification, and widespread anoxia. The Permian-Triassic boundary is a crucial marker in the fossil record, representing a dramatic shift in the types of life forms that dominated the planet. The recovery of biodiversity following this event laid the groundwork for the rise of new groups of organisms, including the dinosaurs, which would go on to dominate the subsequent Mesozoic Era. Studying the Permian-Triassic boundary provides valuable insights into the resilience and vulnerability of life on Earth and the profound impacts of geological and climatic events.