Extinction events

widespread and rapid decrease in the amount of life on earth

prehistoric impact crater buried underneath the Yucatán Peninsula in Mexico

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

hypothetical star orbiting the Sun, responsible of extinction events

worldwide glaciation episodes during the Cryogenian Period of the Neoproterozoic Era

massive extinction event during the current Holocene geological epoch

Paleoproterozoic surge in atmospheric oxygen

mass extinction event at the end of the Ordovician period and the beginning of the Silurian period in the Paleozoic era, around 444 million years ago

mass extinction at the end of the Triassic

geological process of areas of submerged seafloor being exposed above the sea level

severe glaciation during the Paleoproterozoic Era, possibly due to the Oxygen catastrophe, leading to a "Snowball Earth"

geological signature, usually a thin band of rock, marking the transition from the end of the Cretaceous Period and the beginning of the Paleogene Period, dated with radiometric methods, at the age of 66.043 ± 0.011 Ma

mass extinction event, starting at the end of the Frasnian age of Upper Devonian around 372 million years ago

mass extinction event, around 10000 BCE, marking the end of the Pleistocene and the beginning of the Holocene, during which many megafauna species went extinct; hypothesized to be caused by human hunting and/or natural climate change

sub-sea structure under the North Sea

mass extinction

global climate change and biotic turnover that occurred during the Carnian or early Late Triassic

volcanic supereruption 74,000 years ago in Indonesia

glaciation

mass extinction event; occurred approximately 488 million years ago

extinction event; occurred ca. 305 Ma at the end of the Moscovian in the Carboniferous; altered the vast coal forests that covered the equatorial region of Euramerica, fragmenting them into ‘islands’, causing dwarfism and extinction of many species

anoxic extinction events in the Cretaceous period, occurring at 91.5 ± 8.6 Ma

hypothesis that multicellular life, understood as a superorganism, is suicidal, and that microbial-triggered mass extinctions are attempts to return the Earth to a microbial-dominated state

hypothesis on what initiated the Younger Dryas geological period

risk of species becoming extinct due to the effects of global warming

extinction event marking the end of the Proterozoic eon and the beginning of the Phanerozoic eon (as well as the Cambrian era)

mass extinction event in the Ludfordian age of the Silurian period, ca. 424 Ma

extinction of animal and plant life that occurred at the end of the Capitanian stage of the Guadalupian epoch of the Permian period, associated with the Emeishan Traps

extinction event

mass extinction that occurred 273 million years ago in the early Guadalupian of the Permian period

first of three relatively minor extinction events (the Ireviken, Mulde, and Lau events) during the Silurian period; occurred at the Llandovery/Wenlock boundary

anoxic event causng mass extinctions, coinciding with a global drop in sea level, and is closely followed by an excursion in geochemical isotopes, during the Silurian period