File:Rugose corals in limestone (Paleozoic) 2 (34876703133).jpg
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Summary
[edit]DescriptionRugose corals in limestone (Paleozoic) 2 (34876703133).jpg |
Rugose corals in Paleozoic limestone. (public display, Idaho Museum of Natural History, Pocatello, Idaho, USA) The limestone shown above is dominated by solitary rugose corals. Rugose corals are an extinct group of solitary and colonial cnidarians. They are often nicknamed "horn corals", in reference to the upside-down horn shape of the skeletons of solitary forms (Ex: <a href="https://www.flickr.com/photos/jsjgeology/15590522272">www.flickr.com/photos/jsjgeology/15590522272</a>). Solitary rugose corals made solid, tapering skeletons of calcite (CaCO3 - calcium carbonate). During life, a polyp (sea anemone animal) lived in a cup-like depression at the top of the skeleton. These rugose corals appear silicified (the original calcite skeletons have been replaced by quartz/silica, SiO2). Classification: Animalia, Cnidaria, Anthozoa, Rugosa Stratigraphy: unrecorded/undisclosed Locality: unrecorded/undisclosed See info. at: <a href="https://en.wikipedia.org/wiki/Rugosa" rel="nofollow">en.wikipedia.org/wiki/Rugosa</a> |
Date | |
Source | Rugose corals in limestone (Paleozoic) 2 |
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@N05/34876703133 (archive). It was reviewed on 5 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
5 December 2019
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current | 03:29, 5 December 2019 | 3,805 × 2,281 (7.56 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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F-number | f/2.8 |
ISO speed rating | 320 |
Date and time of data generation | 15:55, 13 July 2011 |
Lens focal length | 6.2 mm |
Image title | |
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 13.0 (Macintosh) |
File change date and time | 01:33, 3 July 2017 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 15:55, 13 July 2011 |
Meaning of each component |
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APEX shutter speed | 4.90625 |
APEX aperture | 2.96875 |
APEX exposure bias | 0 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
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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 | Auto 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 | 21:33, 2 July 2017 |
Unique ID of original document | 69720AF3704AEC4253F8F0387DDDC9D7 |