File:Wind erosion in Wadi Al-Hitan.jpg
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Summary[edit]
DescriptionWind erosion in Wadi Al-Hitan.jpg |
English: Wadi Al-Hitan is a very important fossil site that firmly establishes the fossil record of whale evolution from land mammals, one of Darwin's major assertions in The Origin of Species. The wadi hosts skeletons of families of archaic whales in their original geological and geographic setting of the shallow nutrient-rich bay of an early sea of some 30-40 million years ago, in what is now central Egypt.
There is no other place in the world yielding archaic whale fossils of such quality in such abundance and concentration -- over 400 cetacian skeletons have been discovered, the most important finds coming between 1985-1995. Many of the sirenians and cetaceans are preserved as virtually complete articulated skeletons which, uniquely, preserve reduced hind limbs, making them intermediate between earlier land mammals and later modern whales. In addition to the whale fossils, numerous other fossils of plant and animal life provide a rich picture of the ecology of the Tethyan Ocean during Eocene time, enabling interpretation of how animals then lived and how they were related to each other. These fossils are the subject of continuing study and are of iconic value for the study of evolutionary transition, and make the site vitally important as a niche in Earth's natural history. |
Date | |
Source | Wind erosion, Wadi Al-Hitan |
Author | Tom Horton from Shanghai, China |
Camera location | 29° 20′ 31.48″ N, 30° 03′ 14.87″ E | View this and other nearby images on: OpenStreetMap | 29.342079; 30.054130 |
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This image was originally posted to Flickr by Further to Fly at https://www.flickr.com/photos/12116760@N00/2368081579. It was reviewed on 20 May 2009 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-sa-2.0. |
20 May 2009
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current | 02:52, 20 May 2009 | 3,648 × 2,736 (2.47 MB) | Tm (talk | contribs) | {{Information |Description= Wadi Al-Hitan is a very important fossil site that firmly establishes the fossil record of whale evolution from land mammals, one of Darwin's major assertions in The Origin of Species. The wadi hosts skeletons of families of ar |
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Metadata
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Camera manufacturer | OLYMPUS IMAGING CORP. |
Camera model | E-3 |
Exposure time | 1/250 sec (0.004) |
F-number | f/6.7 |
ISO speed rating | 100 |
Date and time of data generation | 01:28, 21 March 2008 |
Lens focal length | 23 mm |
Orientation | Normal |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS2 Windows |
File change date and time | 02:28, 28 March 2008 |
Exposure Program | Normal program |
Exif version | 2.21 |
Date and time of digitizing | 01:28, 21 March 2008 |
APEX shutter speed | 7.965784 |
APEX aperture | 5.488322 |
APEX exposure bias | 0 |
Maximum land aperture | 2.97265625 APEX (f/2.8) |
Metering mode | Center weighted average |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash firing |
Color space | Uncalibrated |
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 |
Scene control | None |
Contrast | Normal |
Saturation | High saturation |
Sharpness | Hard |
Width | 3,648 px |
Height | 2,736 px |
Image width | 3,648 px |
Image height | 2,736 px |
Serial number of camera | D71502062 |
Lens used | 12.0-60.0 mm f/2.8-4.0 |
Date metadata was last modified | 06:28, 28 March 2008 |
IIM version | 2 |