🔎 Vredefort Dome – Definition and Explanation


the Vredefort Dome (in English: Vredefort crater) is the largest known impact crater Land (Earth is the third planet in the solar system in order of distance…). Located on province (The concept of territory has gained increasing importance in geography, especially in …) free countryAfrica (With an area of ​​30,221,532 km2, including islands…) From the south city (A city is an urban unit (“human settlement” for…) to Fredfort inside the hole itself. The site is also known as Vredefort crater or Vredefort impact site. in 2005, dome () de Vredefort is inscribed on the UNESCO World Heritage List for its natural aspect and interest world (A scientist is a person who devotes himself to the study of science or sciences and who…).

Composition and structure

I’asteroid (The asteroid is a celestial body whose dimensions differ by a few tens…) Which hit the ground in Vredefort is one of the main ones (known as tracks (TRACES (TRAde Control and Expert System) is a veterinary health network of …) direct) to hit the ground, the diameter of which is estimated at 10-15 kilometers (The meter (symbol m, from the Greek metron, measure) is the base unit of system length…). The diameter of the crater is about 300 km, which is more than 250 km wide Sudbury Basinand 170 km from Chicxulub crater (Chickxulub crater is a crater caused by a fall…). It is estimated to be just over two billion years old, during the Paleoproterozoic era.

Polycyclic crater Valhalla on Callisto, a moon (The Moon is the only natural satellite of the Earth and the fifth largest satellite in the world…) Jupiter.

The location of the Vredefort crater (27°0′ S, 27°30′ E) is one of the few craters with multiple rings on Earth, while these are common on other planets, including the Moon. the time (Time is a concept developed by humans to understand…) and geological changes, such as erosion and tectonic plates (plate tectonics (formerly continental drift) is the current paradigm for …)Generally destroyed this kind of pit.

The dome in the center of the crater was initially thought to have a volcanic origin, but Boon and Albritton in 1936 and 1937 suggested an impact origin, which was confirmed by Daly in 1947. Modern investigative techniques have made it possible to definitively prove the origin of the impact after significant work. number (The idea of ​​number in linguistics is dealt with in the article “Number…”) of scholars between 1961 and 1995.

References and notes

  1. (in)Bonn, JD; Albritton, C. C. Jr. (1936) Meteorite craters and their possible relationship to cryptic volcanic structuresField and Laboratory, 5, 1-9.
  2. (in) Bonn, JD; Albritton, C. C. Jr. (1937) Meteorite scars in ancient rocksField and Laboratory, 6, 53-64
  3. (in) Daly, R.; a. (1947) The structure of the Vredefort Ring in South Africa, Jeol. 55. 125,145.
  4. (in) Theriault, AM; melancholy, RAF; Reimold, WU (1997) The original volume of the Vredefort Structure: Implications for the geological evolution of the Witwatersrand BasinMeteorites Vol. 32, pp. 71–77

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