2/18/2023 0 Comments Stony iron meteoriteSome iron meteorites also contain many silicate inclusions but are rarely described as stony irons. One group of chondrites (CB) has over 50% metal by volume and contains meteorites that were called stony irons until their affinities with chondrites were recognized. In fact, the term "stony iron" is a misnomer as currently used. These categories have been in use since at least the early 19th century but do not have much genetic significance they are simply a traditional and convenient way of grouping specimens. Meteorites are often divided into three overall categories based on whether they are dominantly composed of rocky material ( stony meteorites), metallic material ( iron meteorites), or mixtures ( stony–iron meteorites). However, with current scientific knowledge, these types of relationships between meteorites are difficult to prove. Similarly classified meteorites may share a common origin, and therefore may come from the same astronomical object (such as a planet, asteroid, or moon) known as a parent body. Meteorite classification may indicate that a "genetic" relationship exists between similar meteorite specimens. Meteorites that do not fit any known group (though they may fit somewhere within a higher level of classification) are ungrouped. Some researchers hierarchize these terms, but there is no consensus as to which hierarchy is most appropriate. There is no single, standardized terminology used in meteorite classification however, commonly used terms for categories include types, classes, clans, groups, and subgroups.
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