File:Ordinary chondrite (NWA 070 Meteorite, Sahara Desert, Africa) 10 (48165800257).jpg
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[edit]DescriptionOrdinary chondrite (NWA 070 Meteorite, Sahara Desert, Africa) 10 (48165800257).jpg |
Ordinary chondrite (North West Africa 070 Meteorite) from the Asteroid Belt between Mars and Jupiter. (cut slice; polished surface; field of view ~7.4 centimeters across) 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) 070 Meteorite was found in 2000 in northwestern Africa's Sahara Desert. NWA 070 is an H6 ordinary chondrite. "H" means high total iron content - notice the numerous, silvery-colored, metallic iron masses in the rock (click on the photo to zoom in). "6" refers to an intensely recrystallized chondritic rock, such that almost all of the chondrules are indiscernible. See info. at: <a href="https://www.lpi.usra.edu/meteor/metbull.php?sea=NWA+070&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 table&code=17079" rel="noreferrer nofollow">www.lpi.usra.edu/meteor/metbull.php?sea=NWA+070&sfor=...</a> |
Date | |
Source | Ordinary chondrite (NWA 070 Meteorite, Sahara Desert, Africa) 10 |
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@N05/48165800257 (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 | 3,972 × 2,896 (10.07 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/1,000 sec (0.001) |
F-number | f/4 |
ISO speed rating | 80 |
Date and time of data generation | 12:00, 30 June 2019 |
Lens focal length | 11.614 mm |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 16.0 (Macintosh) |
File change date and time | 19:58, 30 June 2019 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 12:00, 30 June 2019 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 9.96875 |
APEX aperture | 4 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
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Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 15:58, 30 June 2019 |
Unique ID of original document | 111947ED70B8D2910DA54C9880AAEBDE |