File:Achondrite NWA 15915.jpg
Original file (3,743 × 2,641 pixels, file size: 4.74 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionAchondrite NWA 15915.jpg |
English: The Mysterious Ungrouped Achondrite NWA 15915. It's mostly Mg-rich diopside (gem-like when backlit) and has zero olivine or plagioclase. The little black blebs scattered throughout are visually striking. They look like random scattered paint dots not aligned along crystal boundaries, or mineral type. Some zoom shots below.
Some thoughts from meteoritic experts: Tony Irving: “Those subspherical grains are not metal but Fe sulfides (daubreelite alabandite, troilite)” Andy Tomkins: "Must be melt fractionation to get a diopside dominated rock. Probably cumulate formation to achieve a rock with no plagioclase or olivine. Must be low gravity environment to avoid separation of dense sulfides from silicates. Probably formed deep within an asteroid to achieve the slow crystallisation needed to form big crystals and then exsolution lamellae. Very reduced parent body to get the lack of FeO in the clinipyroxene." More research is underway on this material, and we should know its age by the end of August 2023. 49g slice, backlit. 2023 find in Algeria. Met Bull for NWA 15915. |
Date | |
Source | https://www.flickr.com/photos/jurvetson/53093780194/ |
Author | Steve Jurvetson |
Licensing
[edit]- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This image was originally posted to Flickr by jurvetson at https://flickr.com/photos/44124348109@N01/53093780194. It was reviewed on 5 August 2023 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
5 August 2023
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 03:57, 5 August 2023 | 3,743 × 2,641 (4.74 MB) | Sv1xv (talk | contribs) | Uploaded a work by Steve Jurvetson from https://www.flickr.com/photos/jurvetson/53093780194/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
The following page uses this file:
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Apple |
---|---|
Camera model | iPhone 14 Pro Max |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/2.2 |
ISO speed rating | 160 |
Date and time of data generation | 10:53, 4 August 2023 |
Lens focal length | 2.22 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | 16.5.1 |
File change date and time | 10:53, 4 August 2023 |
Y and C positioning | Centered |
Exposure Program | Normal program |
Exif version | 2.32 |
Date and time of digitizing | 10:53, 4 August 2023 |
Meaning of each component |
|
APEX shutter speed | 5.9065155433578 |
APEX aperture | 2.2750070480205 |
APEX brightness | 2.8961883290515 |
APEX exposure bias | 0 |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
DateTimeOriginal subseconds | 989 |
DateTimeDigitized subseconds | 989 |
Supported Flashpix version | 1 |
Color space | Uncalibrated |
Sensing method | One-chip color area sensor |
Scene type | A directly photographed image |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1.7756433490395 |
Focal length in 35 mm film | 24 mm |
Scene capture type | Standard |