Glossary of meteoritics
From Wikipedia, the free encyclopedia
This is a glossary of terms used in Meteoritics, the science of meteorites.
- 289 Nenetta - an asteroid from the asteroid belt and one of the likely parent bodies of the angrites.
- 3819 Robinson - an asteroid from the asteroid belt and one of the likely parent bodies of the angrites.
- 4 Vesta - second largest asteroid in the asteroid belt and likely source of the HED meteorites.
- IA meteorite - an iron meteorite group now part of the IAB group/complex.
- IAB meteorite - an iron meteorite and primitive achondrite of the IAB group/complex.
- IB meteorite - an iron meteorite group now part of the IAB group/complex.
- IC meteorite - an iron meteorite that is part of the IC group.
- Ablation - the process of a meteorite losing mass during the passage through the atmosphere.
- Acapulcoite - a group of primitive achondrites.
- Accretion - the process in which matter of the protoplanetary disk coalesces to form planetesimals.
- Achondrite - a differentiated meteorite (meaning without chondrules).
- Aerolite - an old term for stony meteorites.
- ALH - an abbreviation used for meteorites from Allan Hills.
- Allan Hills - a mountain chain in Antarctica where meteorites are concentrated by ice movements and can be easily spotted in the snow.
- Allan Hills 84001 - is an exotic meteorite from Mars that does not fit into any of the SNC groups and was thought to contain evidence for life on Mars.
- Allende meteorite - is the largest carbonaceous chondrite ever found on Earth.
- Angrite - a basaltic meteorite.
- Anomalous - meteorites that have properties that are unusual for their group or grouplet.
- ANSMET - the ANtarctic Search for METeorites is scientific program that looks for meteorites in the Transantarctic Mountains.
- Asteroidal achondrite - an achondrite that differentiated on an asteroid or planetesimal (see planetary achondrite)
- Asteroid spectral types - classification of asteroids according to their spectra.
- Aristides Brezina - a meteoriticist.
- Ataxite - an iron meteorite that has no visible structures when etched.
- C - can refer to carbonaceous chondrite or to an iron meteorite designation (Roman numeral and letter).
- Carbonaceous chondrite
- CAI - an abbreviation of Calcium-aluminium-rich inclusion
- Calcium-aluminium-rich inclusion
- Chondrite - stony meteorites unmodified by melting or differentiation of the parent body
- Chondrule - millimetre-scale round grains found in chondrites
- Clan - meteorites that are not similar enough to form a group, but are also not too different from each other to be put in separate classes.
- Class - two or more groups that have a similar chemistry and oxygen isotope ratios.
- Compositional type - a classification based on overall composition, for example stony, iron, stony-iron (as introduced by Maskelyne). Can also refer to the composition deduced from spectroscopy of asteroids.
- Condensation - the process of chemicals changing from the gaseous to the solid phase during the cooling of the protoplanetary disk.
- Condensation sequence - the sequence of minerals that changes from the gaseous to the solid state while the protoplanetary disk cools.
- Cosmic dust - small interplanetary and interstellar particles that are similar to meteorites (See Micrometeorite).
- Cosmochemistry - the science of the chemistry of the Solar System, which is based in part on the chemistry of meteorites.
- Dar al Gani
- 'Desert glass' - natural glass found in deserts formed from the silica in sand as a result of lightning strikes or meteor impacts.
- Differentiated - a meteorite that has undergone igneous differentiation. (See: achondrite)
- Differentiation - usually the process of a planetesimal forming an iron core and silicate mantle.
- Duo - a grouping of two meteorites that share similar characteristics (see Grouplet).
- E - can refer to enstatite chondrite or to an iron meteorite designation (Roman numeral and letter).
- Eagle Station grouplet
- Enstatite achondrite - a meteorite that is mostly composed of enstatite. Usually part of the aubrite group.
- Enstatite chondrite
- Fall - a meteorite that was seen while it fell to Earth and found.
- Find - a meteorite that was found without seeing it fall.
- Fragment - a part of a meteorite that broke during passage through the atmosphere.
- Fragmentation - the process in which a meteorite breaks while falling through the atmosphere.
- Fusion crust - a coating on meteorites that forms during their passage through the atmosphere.
- Group - a collection of more than 5 meteorites sharing similar characteristics.
- Grouplet - a collection of less than 5 meteorites sharing similar characteristics.
- Gustav Rose - a meteoriticist.
- Gustav Tschermak - a meteoriticist.
- HED - abbreviation for three basaltic achondrite groups howardite, eucrite and diogenite.
- HED meteorite - a clan of basaltic achondrites.
- Hunter - a person that is searching for meteorites.
- Impact breccia - rock composed of fragments of terrestrial, extraterrestrial or mixed origin fused by the energy of impact
- Impactite - informal term for a terrestrial rock resulting from the shocking impact of a meteor.
- Iron-nickel alloy - an alternative expression for meteoric iron.
- Iron meteorite - a meteorite that is mainly composed of meteoric iron.
- Kakangari chondrite - a group of chondrite meteorites.
- Kamacite - a native metal (mineral) found in meteorites.
- Lodranite - member of a small group of primitive achondrites thought to derive from deeper within the same parent body as acapulcoites
- Lunaite - a meteorite that originated from the moon (synonym of Lunar meteorite). Compare Category:Meteorites found on bodies other than Earth.
- Lunar meteorite - a meteorite that originated from the Moon (synonym of Lunaite). Compare Category:Meteorites found on bodies other than Earth.
- Main group pallasite - a pallasite belonging to the main group.
- Main mass - the largest/heaviest piece of a fragmented meteorite, typically found in a strewn field.
- Magmatic - igneous, that is, solidified magma or produced by magma
- Magmatic meteorite
- Martian meteorite - a meteorite that originated from Mars. Compare Category:Meteorites found on bodies other than Earth.
- Maskelynite - a natural glas found in meteorites.
- Matrix - the mineral assemblage surrounding chondrules.
- Mesosiderite - a grouping of stony-iron meteorite that are breccias.
- Meteor - a object passing through Earth's atmosphere emitting light.
- Meteoric iron - a native metal found in meteorites and a mixture of different mineral phases. Compare telluric iron.
- Meteoroid - a natural object in space no larger than 1 meter.
- Meteorite - a rock found on the Earth's surface that did not form on Earth.
- Meteorite Observation and Recovery Program - a scientific program that was centered in Canada.
- Meteoriticist - a scientist working on meteorites.
- Meteoritics - the science of meteorites.
- MORP - abbreviation for Meteorite Observation and Recovery Program.
- Micrometeorite - microscopic meteorites derived from Cosmic dust.
- Neumann lines (or Neumann bands) - a pattern of fine parallel lines seen in some iron meteorites, thought to be due to impact events on the parent body
- Nevil Story-Maskelyne - a meteoriticist.
- Nonmagmatic meteorite
- Northwest Africa - a popular meteorite find location.
- NWA - abbreviation of northwest Africa.
- O - usually refers to ordinary chondrite
- Observed fall - a meteorite that was seen when it fell to Earth.
- Ordinary chondrite - a chondrite meteorite, where 'ordinary' means that it is the most common found
- Oriented - ?, eg Photo: An oriented specimen of the <name> meteorite.
- Panspermia - the theory that life could reach other planets by the means of meteorites and/or comets.
- Parent body
- Petrologic type
- Pitts grouplet - a grouplet of meteorites that is part of the IAB meteorites
- Planetary achondrite - an achondrite that was differentiated on a planet and not a planetesimal or asteroid (See asteroidal achondrite).
- Plessite - a fine grained intergrowth found in meteoric iron consisting of kamacite, taenite and tetrataenite lamella.
- Presolar grains
- Primitive meteorite
- Primitive achondrite - a meteorite that has similarities with achondrites and chondrites.
- Pristine - extent of a meteorite shock stage and weathering.
- Protoplanetary disk - a cicumstellar disk from which all solids in the Solar System formed.
- Pyroxene pallasite grouplet
- QUE - abbreviation for Queen Alexandra Range.
- Queen Alexandra Range - a mountain range in eastern Antarctica where many meteorites are found.
- Regmaglypts - thumb print sized indentations in the surface of larger meteorites formed by ablation as the meteorite passes through a planet's atmosphere, probably caused by vortices of hot gas.
- Refractory elements - chemical elements that have high boiling and condensation temperatures.
- Rose-Tschermak-Brezina classification - a classification developed by Gustav Rose, Gustav Tschermak and Aristides Brezina.
- Rumuruti chondrite - a group of chondrites.
- Shock stage
- Shock metamorphism
- Siderite - the old term for iron meteorite.
- Siderolite - the old term for stony-iron meteorites.
- SNC - abbreviation for shergottite, nakhlite and chassignite, the three martian meteorites.
- Solar nebula - a synonym of the protoplanetary disk.
- Spectral class -
- Stony meteorite - a meteorite composed mostly of silicates.
- Stony-iron meteorite - a meteorite that is a mixture of meteoric iron and silicates.
- Strewn field - a field of fragments from one meteorite fall.
- Structural class - a subdivision of iron meteorites in ataxites, hexahedrites and octahedrites.
- Taenite - a native metal (mineral) found in meteorites.
- Total known weight (TKW) - total known mass of a meteorite.
- Trio - a grouping of three meteorites that share similar characteristics (see Grouplet).
- Tunguska event - an air burst of a meteorite that caused major destruction.
- Type - subdivision of meteorites. Loosely defined. Usually refers to chondrite, achondrite and sometimes primitive achondrite.
- Udei Station grouplet - a grouplet of meteorites that is part of the IAB meteorites.
- Ungrouped - a meteorite that has not been assigned to a group or grouplet.
- Vesta - second largest asteroid in the asteroid belt and likely source of the HED meteorites.
- Volatile elements - are chemical elements that have low boiling and condensation temperatures.
- Weathering - the terrestrial alteration of a meteorite.
- Widmanstätten pattern - a fine interleaving of kamacite and taenite bands/ribbons found in octahedrite irons and some pallasites.
- Weston meteorite - The Weston meteorite is a meteorite which fell to earth above the town of Weston, Connecticut on December 14, 1807.
- YA - abbreviation for Yamato Mountains.
- Yamato Mountains - a group of mountains in Antarctica where many meteorites are found.
- M. K. Weisberg; T. J. McCoy, A. N. Krot (2006). "Systematics and Evaluation of Meteorite Classification". In D. S. Lauretta, H. Y. McSween, Jr. Meteorites and the early solar system II. Tucson: University of Arizona Press. pp. 19–52. ISBN 978-0816525621. Retrieved 15 December 2012.
- Agee, C. B.; N.V. Wilson; F.M. McCubbin; Z.D. Sharp; K. Ziegler (2012). "Basaltic Breccia NWA 7034: New ungrouped planetary Achondrite". 43rd Lunar and Planetary Science Conference. Retrieved 4 January 2013.
- Goldstein, J. I.; Michael, J. R. (1 April 2006). "The formation of plessite in meteoritic metal". Meteoritics & Planetary Science 41 (4): 553–570. doi:10.1111/j.1945-5100.2006.tb00482.x.
- "regmaglypts". METEORITE OR METEORWRONG?. Department of Earth and Planetary Sciences, Washington University in St. Louis. Retrieved 15 January 2013.
- "The Weston Meteorite (Yale Peabody Museum)".