In meteoritics, a meteorite classification system attempts to group similar meteorites and allows scientists to communicate with a standardized terminology when discussing them. Meteorites are classified according to a variety of characteristics, especially mineralogical, petrological, chemical, and isotopic properties.
A chondrite is a stony (non-metallic) meteorite that has not been modified, by either melting or differentiation of the parent body. They are formed when various types of dust and small grains in the early Solar System accreted to form primitive asteroids. Some such bodies that are captured in the planet's gravity well become the most common type of meteorite by arriving on a trajectory toward the planet's surface. Estimates for their contribution to the total meteorite population vary between 85.7% and 86.2%.
Carbonaceous chondrites or C chondrites are a class of chondritic meteorites comprising at least 8 known groups and many ungrouped meteorites. They include some of the most primitive known meteorites. The C chondrites represent only a small proportion (4.6%) of meteorite falls.
The H type ordinary chondrites are the most common type of meteorite, accounting for approximately 40% of all those catalogued, 46% of the ordinary chondrites, and 44% of all chondrites. The ordinary chondrites are thought to have originated from three parent asteroids, whose fragments make up the H chondrite, L chondrite and LL chondrite groups respectively.
The L type ordinary chondrites are the second most common group of meteorites, accounting for approximately 35% of all those catalogued, and 40% of the ordinary chondrites. The ordinary chondrites are thought to have originated from three parent asteroids, with the fragments making up the H chondrite, L chondrite and LL chondrite groups respectively.
Dakhla-Oued Ed-Dahab is one of the twelve regions of Morocco. Before September 2015 it was known as Oued Ed-Dahab-Lagouira. It is situated in the disputed territory of Western Sahara, considered by Morocco to be the southern part of the country. The Polisario Front and other independence-seeking Sahrawis consider this to be a part of the Sahrawi Arab Democratic Republic. The United Nations and most countries do not recognize either Moroccan sovereignty over the area, or the self-declared Sahrawi republic.
Boujdour Province is a province in the Moroccan occupied region of Laâyoune-Sakia El Hamra, Western Sahara. Its population in 2004 was 46,129. Its major town is Boujdour.
Oued Ed-Dahab is a province in the Moroccan economic region of Dakhla-Oued Ed-Dahab, in the disputed territory of Western Sahara. Its population at the 2004 Census was 65,378. Its major town is Dakhla.
Agen is an H chondrite meteorite that fell to earth on September 5, 1814, in Aquitaine, France.
Allegan is a type 5 H chondrite meteorite that landed in Michigan on July 10, 1899. Allegan weighed around fifty pounds after its landing. As of 1964, it was one of only seven known meteorites to land in Michigan.
Ambapur Nagla is an H chondrite meteorite that fell to earth on May 27, 1895, in Uttar Pradesh, India.
Anlong is an H chondrite meteorite that fell to earth on May 2, 1971, in Guizhou, China.
Arroyo Aguiar is an H chondrite meteorite that fell to earth during the summer of 1950 in the province of Santa Fe, Argentina.
Assisi is an H chondrite meteorite that fell to earth at 7:00 am on May 24, 1886, in Perugia, Umbria, Italy.
CI chondrites, also called C1 chondrites or Ivuna-type carbonaceous chondrites, are a group of rare carbonaceous chondrite, a type of stony meteorite. They are named after the Ivuna meteorite, the type specimen. CI chondrites have been recovered in France, Canada, India, and Tanzania. Their overall chemical composition closely resembles the elemental composition of the Sun, more so than any other type of meteorite.
Bir Anzarane is a town in the disputed area of Western Sahara. It is administered by Morocco as a rural commune in Oued Ed-Dahab Province in the region of Dakhla-Oued Ed-Dahab. At the time of the 2004 census, the commune had a total population of 6597 people living in 262 households.
Gleibat El Foula is a town in the disputed territory of Western Sahara. It is administered by Morocco as a rural commune in Oued Ed-Dahab Province in the region of Dakhla-Oued Ed-Dahab. At the time of the 2004 census, the commune had a total population of 2973 people living in 42 households.
El Argoub orEl Aargub is a town in the disputed territory of Western Sahara. It is administered by Morocco as a rural commune in Oued Ed-Dahab Province of the region of Dakhla-Oued Ed-Dahab. At the time of the 2004 census, the commune had a total population of 5345 people living in 1012 households.
Winonaites are a group of primitive achondrite meteorites. Like all primitive achondrites, winonaites share similarities with chondrites and achondrites. They show signs of metamorphism, partial melting, brecciation and relic chondrules. Their chemical and mineralogical composition lies between H and E chondrites.
CM chondrites are a group of chondritic meteorites which resemble their type specimen, the Mighei meteorite. The CM is the most commonly recovered group of the 'carbonaceous chondrite' class of meteorites, though all are rarer in collections than ordinary chondrites.
