File:Cyclura rileyi rileyi (San Salvador rock iguana) (Green Cay, offshore from northwestern San Salvador Island, Bahamas) 6 (15853324788).jpg
![File:Cyclura rileyi rileyi (San Salvador rock iguana) (Green Cay, offshore from northwestern San Salvador Island, Bahamas) 6 (15853324788).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/0/08/Cyclura_rileyi_rileyi_%28San_Salvador_rock_iguana%29_%28Green_Cay%2C_offshore_from_northwestern_San_Salvador_Island%2C_Bahamas%29_6_%2815853324788%29.jpg/800px-Cyclura_rileyi_rileyi_%28San_Salvador_rock_iguana%29_%28Green_Cay%2C_offshore_from_northwestern_San_Salvador_Island%2C_Bahamas%29_6_%2815853324788%29.jpg?20150503205849)
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[edit]DescriptionCyclura rileyi rileyi (San Salvador rock iguana) (Green Cay, offshore from northwestern San Salvador Island, Bahamas) 6 (15853324788).jpg |
Cyclura rileyi rileyi (Stejneger, 1903) - female San Salvador rock iguana. This lizard is one of the rarest reptiles on Earth. The species is sexually dimorphic: females have smaller body size and small dorsal crests (see above), while males are larger and have more prominent dorsal crests (see elsewhere in this album). Population estimates indicate that only several hundred individuals exist on Earth today. San Salvador rock iguanas are principally herbivores. The rocks are eolian aragonitic calcarenite limestones of Pleistocene age (probably the Owl's Hole Formation, Middle Pleistocene). The rusty brown-colored surface is a near-earliest Holocene, ~9200 year-old calcrete (a.k.a. terra rosa paleosol). Calcretes are modern or ancient calcium-carbonate rich soil horizons that are rock hard. The term "terra rosa" refers to the rusty brown coloration of iron oxide (hematite & limonite), which is typical of fossil soil horizons in the Bahamas rock record. Classification: Animalia, Vertebrata, Reptilia, Squamata, Iguanidae Locality: Green Cay, western Graham’s Harbour, offshore from northwestern San Salvador Island, eastern Bahamas |
Date | |
Source | Cyclura rileyi rileyi (San Salvador rock iguana) (Green Cay, offshore from northwestern San Salvador Island, Bahamas) 6 |
Author | James St. John |
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This image was originally posted to Flickr by jsj1771 at https://www.flickr.com/photos/47445767@N05/15853324788. It was reviewed on 3 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0. |
3 May 2015
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Camera manufacturer | NIKON CORPORATION |
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Camera model | NIKON D70s |
Exposure time | 1/1,600 sec (0.000625) |
F-number | f/10 |
Date and time of data generation | 14:10, 14 June 2008 |
Lens focal length | 200 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 01:06, 17 December 2014 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 14:10, 14 June 2008 |
Meaning of each component |
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Image compression mode | 4 |
APEX exposure bias | 0 |
Maximum land aperture | 5 APEX (f/5.66) |
Metering mode | Pattern |
Light source | Unknown |
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DateTime subseconds | 20 |
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DateTimeDigitized subseconds | 20 |
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Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
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Supported Flashpix version | 1 |
Image width | 3,008 px |
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Date metadata was last modified | 20:06, 16 December 2014 |