Impact event - Wikipedia
Impact conditions such as asteroid size and speed, but also density and impact angle determine the kinetic energy released in an impact event. The more energy is released, the more damage is likely to occur on the ground due to the environmental effects triggered by the impact.
Meteors & Meteorites Facts - Science@NASA
Early Earth experienced many large meteor impacts that caused extensive destruction. While most craters left by ancient impacts on Earth have been erased by erosion and other geologic processes, the Moon’s craters are still largely intact and visible.
How a giant, ancient meteorite impact helped fledgling life on …
2024年10月22日 · When a meteorite with the mass of four Mount Everests hit Earth 3.2 billion years ago, it caused global chaos and provided an unexpected silver lining for life.
What happened when giant S2 meteor hit Earth 3 billion years …
2024年10月21日 · Graphical depiction of the S2 impact and its immediate aftereffects. The S2 meteorite, estimated to have been up to 200 times larger than the one that killed the dinosaurs, triggered a tsunami that mixed up the ocean and flushed debris from the land into coastal areas.
Impactites: Impact Breccia, Tektites, Moldavites, Shattercones
The terrestrial materials near, or beneath, an impact site are described as target rock. These terrestrial rocks, physically altered by the tremendous heat, pressure and shock waves associated with very large meteorite impacts, are known as impactites.
Effect of a giant meteorite impact on Paleoarchean surface
Large meteorite impacts must have strongly affected the habitability of the early Earth. Rocks of the Archean Eon record at least 16 major impact events, involving bolides larger than 10 km in diameter. These impacts probably had severe, albeit temporary, consequences for …
Meteorite crater - Impact Process, Ejecta, Shockwaves | Britannica
Immediately after a meteorite strikes the surface of the planet, shock waves are imparted both to the surface material and to the meteorite itself.
Impact event | Definition, Examples, & Facts | Britannica
2022年9月26日 · It was formed by the Chicxulub impact event approximately 66 million years ago, when Earth was struck by an asteroid or comet approximately 14 km (8.7 miles) in diameter. The impact event caused widespread devastation, including wildfires and tsunamis.
Impact Earth: A review of the terrestrial impact record
2022年9月1日 · In the literature, sites proposed to be of extraterrestrial origin are referred to by various terms: “craters”, “impact craters”, “hypervelocity impact craters” or “meteorite impact craters”.
Meteorite crater | Impact Structure, Geology & Formation
Meteorite crater, depression that results from the impact of a natural object from interplanetary space with Earth or with other comparatively large solid bodies such as the Moon, other planets and their satellites, or larger asteroids and comets.