File:Chondrules from the NWA 869 L3-6 Chondrite (50867953891).jpg
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[edit]DescriptionChondrules from the NWA 869 L3-6 Chondrite (50867953891).jpg |
a heart-shaped world. More below, Polished half of a stone meteorite with abundant chondrules. The finished face of this NWA 869 end cut displays numerous 4.56-billion-year-old chondrules—the building blocks of the rocky bodies of the solar system. It contains multiple and varied examples of the oldest remnants of our own solar system and the face also shows an abundance of tiny, extraterrestrial nickel-iron flecks. "Northwest Africa 869 is a regolith breccia, containing solar noble gases and preirradiated lithologies. Olivine in lithic clasts. Fracture faces, formed by ground collision, show a typical gray-green color and sometimes visible brecciation (light and/or dark clasts)." — <a href="https://www.lpi.usra.edu/meteor/metbull.php?code=31890" rel="noreferrer nofollow">Meteoritical Bulletin</a>, Found in 2000. "It is an L3–6 chondrite and probably represents the largest sample of the rare regolith breccias from the L–chondrite asteroid. We speculate that this material stems from a region of the parent body that was only weakly consolidated." "We found that Ar release of impact lithologies at intermediate temperature extractions displays apparent ages very similar to the solar system age of 4.56 billion years." 4.4 billion years ago it was "heated by an early impact event. The final assembly and shock lithification of NWA 869 occurred less than 1.79 billion years ago. None of the measured components indicate involvement in the cataclysmic event approximately 470 million years ago, which affected many other L–chondrites and likely disrupted the L–chondrite parent body." — <a href="https://onlinelibrary.wiley.com/doi/full/10.1111/j.1945-5100.2011.01181.x" rel="noreferrer nofollow">2011 Study</a> The companion <a href="https://onlinelibrary.wiley.com/doi/full/10.1111/j.1945-5100.2011.01204.x" rel="noreferrer nofollow">study</a> of the cosmogenic radionuclides and noble gases conclude that it landed on Earth about 4,400 years ago. "NWA 869 represents a special and unusually large sample of the lithified regolith of the L‐chondrite parent body." |
Date | |
Source | Chondrules from the NWA 869 L3-6 Chondrite |
Author | Steve Jurvetson from Los Altos, USA |
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This image was originally posted to Flickr by jurvetson at https://flickr.com/photos/44124348109@N01/50867953891. It was reviewed on 10 May 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
10 May 2021
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Camera manufacturer | Canon |
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Camera model | Canon EOS 5D Mark IV |
Exposure time | 1/200 sec (0.005) |
F-number | f/10 |
ISO speed rating | 25,600 |
Date and time of data generation | 17:24, 4 October 2020 |
Lens focal length | 65 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
File change date and time | 17:24, 4 October 2020 |
Y and C positioning | Centered |
Exposure Program | Aperture priority |
Exif version | 2.3 |
Date and time of digitizing | 17:24, 4 October 2020 |
Meaning of each component |
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APEX aperture | 6.625 |
APEX exposure bias | 0 |
Maximum land aperture | 2.8284271210653 APEX (f/2.67) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 000 |
DateTimeOriginal subseconds | 000 |
DateTimeDigitized subseconds | 000 |
Supported Flashpix version | 1 |
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Focal plane X resolution | 5,719.1489361702 |
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Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Standard |
Lens used | Canon MP-E 65mm f/2.8 1-5x Macro Photo |