File:Vesicular lava (July-August 2001 eruption of Mt. Etna, eastern Sicily) 3.jpg
Original file (3,836 × 2,610 pixels, file size: 5.99 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionVesicular lava (July-August 2001 eruption of Mt. Etna, eastern Sicily) 3.jpg |
English: Mt. Etna is a regularly-erupting volcano along the eastern margin of Sicily, a large Mediterranean island offshore from southern Italy. Generally, Etna's eruptions are strombolian in style and spectacularly gorgeous, especially when viewed at night (e.g., www.flickr.com/photos/fabriziozuccarello/50953312297/in/p... ). Etna is also famous for blowing smoke rings (e.g., www.flickr.com/photos/volcanoes/10842987365/in/photostrea... ).
Much of Etna's erupted material is trachybasalt. Trachybasalt has the same general physical, chemical, and mineralogical characteristics as basalt, but is more alkaline (= relatively high Na and K content). The sample seen here is from a July-August 2001 lava flow of Etna - such rocks are reported to be potassic trachybasalt. The specimen is porphyritic - it shows vesicles on broken surfaces and is somewhat scoriaceous on flow top surfaces. Reported phenocrysts include plagioclase feldspar, pyroxene and olivine. Provenance: collected August 2001 |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/51023509068/ |
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@N05/51023509068. It was reviewed on 11 March 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
11 March 2021
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 21:11, 11 March 2021 | 3,836 × 2,610 (5.99 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51023509068/ with UploadWizard |
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/10 |
ISO speed rating | 80 |
Date and time of data generation | 18:54, 10 March 2021 |
Lens focal length | 9.681 mm |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 18.0 (Macintosh) |
File change date and time | 19:59, 10 March 2021 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 18:54, 10 March 2021 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.65625 |
APEX exposure bias | −1.3333333333333 |
Maximum land aperture | 3.625 APEX (f/3.51) |
Metering mode | Pattern |
Flash | Flash fired, compulsory flash firing, red-eye reduction mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
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 | Standard |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 14:59, 10 March 2021 |
Unique ID of original document | 84CFDA872F645B03B83A5C5FBDE3BCCB |