The Chinguetti meteorite is a find reputed to come from a large unconfirmed 'iron mountain' in Africa.
The existence of a huge stony-iron mesosiderite approximately 45 kilometers from the Saharan city Chinguetti, Mauritania, has been a mystery since 1916, when Captain Gaston Ripert, a French consular official, claimed to have discovered 'a huge iron hill 40 metres (130ft) high and 100 metres (330ft) long.'
Ripert said that he had been guided blindfolded by a local chieftain to a natural source of iron, after a 12-hour-long camel ride to the south-east of Chinguetti.
He bagged a 4 kilogram fragment of the rock, which found its way to Paris some years later, where geologist Alfred Lacroix pronounced that it was an important discovery. However, despite the attempts of several expeditions since, the supposed meteorite could not be found again.
Ripert wrote to Professor Théodore Monod in 1934: 'I know that the general opinion is that the stone does not exist; that to some, I am purely and simply an impostor who picked up a metallic specimen. That to others, I am a simpleton who mistook a sandstone outcrop for an enormous meteorite. I shall do nothing to disabuse them, I know only what I saw.' Despite various searches over the years, Monod concluded in 1989 that Ripert had been mistaken: 'An error was made in the identification of the rock of a 40-metre hill that is entirely sedimentary with no trace of metal,' he wrote.
In 1980, former French air force officer Jacques Gallouédec was carrying out aerial surveys for the Mauritanian water authority, when he spotted a strange semi-circular ground formation to the south-east of Chinguetti. He sent details to Théodore Monod but the professor was unable to locate it.
Finally, the Chinguetti fragment that was sent to Paris was analysed again, and it was concluded that it could not have been from a meteorite larger than 80cm (31in) in radius.
A meteorite is a solid piece of debris from an object, such as a comet, asteroid, or meteoroid, that originates in outer space and survives its passage through the atmosphere to reach the surface of a planet or moon. When the original object enters the atmosphere, various factors such as friction, pressure, and chemical interactions with the atmospheric gases cause it to heat up and radiate energy. It then becomes a meteor and forms a fireball, also known as a shooting star; astronomers call the brightest examples "bolides". Once it settles on the larger body's surface, the meteor becomes a meteorite. Meteorites vary greatly in size. For geologists, a bolide is a meteorite large enough to create an impact crater.
The Tunguska event was a 3–5 megaton explosion that occurred near the Podkamennaya Tunguska River in Yeniseysk Governorate, Russia, on the morning of 30 June 1908. The explosion over the sparsely populated East Siberian taiga flattened an estimated 80 million trees over an area of 2,150 km2 (830 sq mi) of forest, and eyewitness accounts suggest up to three people may have died. The explosion is generally attributed to a meteor air burst, the atmospheric explosion of a stony asteroid about 50–60 metres wide. The asteroid approached from the east-south-east, probably with a relatively high speed of about 27 km/s (60,000 mph). Though the incident is classified as an impact event, the object is thought to have exploded at an altitude of 5 to 10 kilometres rather than hitting the Earth's surface, leaving no impact crater.
Meteor Crater or Barringer Crater is an impact crater about 37 mi (60 km) east of Flagstaff and 18 mi (29 km) west of Winslow in the desert of northern Arizona, United States. The site had several earlier names, and fragments of the meteorite are officially called the Canyon Diablo Meteorite, after the adjacent Canyon Diablo.
The Wabar craters are impact craters located in Saudi Arabia first brought to the attention of Western scholars by British Arabist, explorer, writer and Colonial Office intelligence officer St John Philby, who discovered them while searching for the legendary city of Ubar in Arabia's Rub' al Khali in 1932.
The Richat Structure, or Guelb er Richât, is a prominent circular geological feature in the Adrar Plateau of the Sahara. It is located near Ouadane in the Adrar Region of Mauritania. In the local dialect, rīšāt means feathers and it also is known locally in Arabic as tagense, referring to the circular opening of the leather pouch that is used to draw water from local wells.
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An iron meteorite fell on the Sikhote-Alin Mountains, in southeastern Russia, in 1947. Large iron meteorite falls have been witnessed and fragments recovered but never before, in recorded history, a fall of this magnitude. An estimated 23 tonnes of fragments survived the fiery passage through the atmosphere and reached the Earth.
The Adrar is a highland natural and historical region of the Sahara Desert in northern Mauritania. The Adrar Region, an administrative division of Mauritania, is named after the traditional region. It is sometimes called Adrar Tamar to distinguish it from other areas called Adrar in the Sahara.
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Théodore André Monod was a French naturalist, humanist, scholar and explorer.
The Karoonda meteorite is a meteorite that fell to earth on 25 November 1930 at 10:53 pm near the South Australian town of Karoonda. It is of a rare composition, being carbonaceous chondrite, and is also rare in that it was found so soon after its landing. Several fragments are now held in the South Australian Museum in Adelaide.
The Carancas impact event refers to the fall of the Carancas chondritic meteorite on September 15, 2007, near the village of Carancas in Peru, close to the Bolivian border and Lake Titicaca. The impact created a small crater in the clay soil and scorched earth around its location. A local official, Marco Limache, said that "boiling water started coming out of the crater, and particles of rock and cinders were found nearby", as "fetid, noxious" gases spewed from the crater. Surface impact occurred above 3,800 metres (12,500 ft).
The Egyptian Geological Museum is a museum in Cairo, Egypt. The museum was established in 1901 as part of the Egyptian Geological Survey, which had been started in 1896 under the direction of the Khedive Ismail. The museum was the first of its kind in the Middle East and the African continent.
Neuschwanstein was an enstatite chondrite meteorite that fell to Earth on 6 April 2002 at 22:20:18 GMT near Neuschwanstein Castle, Bavaria, at the Germany–Austria border.
The Cranbourne meteorite is an octahedrite iron meteorite. It is the second largest meteorite found in Australia after the Mundrabilla meteorite, but at the time of discovery it was the largest known iron meteorite in the world. It is classified as a main group IAB meteorite.
The Mundrabilla meteorite is an iron meteorite found in 1911 in Australia, one of the largest meteorites found, with a total known weight of 22 tonnes and the main mass accounting for 12.4 tonnes.
The Chelyabinsk meteorite is the fragmented remains of the large Chelyabinsk meteor of 15 February 2013 which reached the ground after the meteor's passage through the atmosphere. The descent of the meteor, visible as a brilliant superbolide in the morning sky, caused a series of shock waves that shattered windows, damaged approximately 7,200 buildings and left 1,491 people injured. The resulting fragments were scattered over a wide area.
Jodzie is a meteorite that fell on 17 June 1877 near the village of Juodžiai near Panevėžys. It is a relatively rare howardite with some carbonaceous inclusions that were likely a result of an asteroid collision. Therefore, despite its small size, it has been a subject of several scientific studies.
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