File:Ordinary chondrite (NWA 11054 Meteorite, northwestern Africa) (48954309103).jpg
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[edit]DescriptionOrdinary chondrite (NWA 11054 Meteorite, northwestern Africa) (48954309103).jpg |
Ordinary chondrite (North West Africa 11054 Meteorite) from the Asteroid Belt between Mars and Jupiter. (cut slice; polished surface; ~6.1 centimeters across at its widest) Chondrites are the most common type of meteorites that fall to Earth. Chondrite classification is moderately complicated, and considers isotopic, chemical, mineralogical, textural, metamorphic, and weathering factors. Chondrites are derived from bodies in the Asteroid Belt that never underwent differentiation. That is, the parent bodies never experienced a heating event sufficient to produce a core, mantle, and crust. All chondrites contain spherical to subspherical to somewhat irregularly shaped structures called chondrules. Chondrules are composed principally of mafic minerals (olivine and pyroxene). Chondrules are nearly the oldest materials in the entire solar system. Chondrites subjected to significant thermal metamorphism some time in their history have chondrules that are partially to almost completely recrystallized. The North West Africa (NWA) 11054 Meteorite was found in 2016. NWA 11054 is an LL3 or L3 ordinary chondrite. "LL" and "L" mean low total iron content - not many silvery-colored, metallic iron masses are present here (but are best seen when tilted in the light). "3" refers to a non-metamorphosed chondritic rock, with the chondrules well preserved and well defined, with little to no alteration since their formation. See info. at: <a href="https://www.lpi.usra.edu/meteor/metbull.php?sea=NWA+11054&sfor=names&ants=&nwas=&falls=&valids=&stype=contains&lrec=50&map=ge&browse=&country=All&srt=name&categ=All&mblist=All&rect=&phot=&strewn=&snew=0&pnt=Normal%20table&code=64681" rel="noreferrer nofollow">www.lpi.usra.edu/meteor/metbull.php?sea=NWA+11054&sfo...</a> |
Date | |
Source | Ordinary chondrite (NWA 11054 Meteorite, northwestern Africa) |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/48954309103 (archive). It was reviewed on 25 October 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
25 October 2019
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current | 01:30, 25 October 2019 | ![]() | 2,935 × 1,865 (5.47 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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File change date and time | 18:02, 24 October 2019 |
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Unique ID of original document | B2E8F29FF023ACAE73B3731ADB5DF59C |
Date and time of digitizing | 13:56, 24 October 2019 |
Date metadata was last modified | 14:02, 24 October 2019 |