File:Salt_evaporation_ponds_on_San_Francisco_Bay.jpg
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Summary
DescriptionSalt evaporation ponds on San Francisco Bay.jpg | Salt evaporation ponds formed by salt water impounded within levees in former tidelands on the shores of San Francisco Bay. There are many of these ponds surrounding the South Bay. As the water evaporates, micro-organisms of several kinds come to predominate and change the color of the water. First come green algae, then darkening as orange brine shrimp predominate. Finally red predominates as dunaliella salina, a micro-algae containing high amounts of beta-carotene (itself with high commercial value), predominates. Other organisms can also change the hue of each pond. Colors include red, green, orange and yellow, brown and blue. Finally, when the water is evaporated, the white of salt alone remains. This is harvested with machines, and the process repeats. |
Date | Taken on 31 October 2009, 18:58 |
Source | 2009-10_31_BOS-SFO_398 |
Author | Doc Searls from Santa Barbara, USA |
Object location | 37° 28′ 50.22″ N, 122° 01′ 28.46″ W | View this and other nearby images on: OpenStreetMap | 37.480618; -122.024572 |
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Licensing
This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by dsearls at https://flickr.com/photos/52614599@N00/4096329287. It was reviewed on 14 May 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
14 May 2020
Items portrayed in this file
depicts
some value
31 October 2009
37°28'50.225"N, 122°1'28.459"W
image/jpeg
8ca0a7a1ee37421fe9ceb14b7218cd533f29f26f
5,664,678 byte
2,336 pixel
3,504 pixel
0.00625 second
38 millimetre
160
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:15, 14 May 2020 | 3,504 × 2,336 (5.4 MB) | Evrik | Transferred from Flickr via #flickr2commons |
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
- San Francisco Bay Salt Ponds
- User:Mercurywoodrose/SFBA galleries
- Wikipedia:Did you know/Statistics/Monthly DYK pageview leaders/2020
- Wikipedia:Did you know/Statistics/Monthly DYK pageview leaders/2020/June
- Wikipedia:Main Page history/2020 June 3
- Wikipedia:Recent additions/2020/June
- Template:Did you know nominations/San Francisco Bay Salt Ponds
- Portal:San Francisco Bay Area
- Portal:San Francisco Bay Area/Did you know/79
- Portal:San Francisco Bay Area/Did you know/Archive
- Portal:San Francisco Bay Area/Did you know/Current
- Portal:San Francisco Bay Area/Selected picture/233
- Portal:San Francisco Bay Area/Selected picture/Archive
Global file usage
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- Usage on fr.wikipedia.org
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Metadata
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Camera manufacturer | Canon |
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Camera model | Canon EOS 30D |
Exposure time | 1/160 sec (0.00625) |
F-number | f/8 |
ISO speed rating | 160 |
Date and time of data generation | 18:58, 31 October 2009 |
Lens focal length | 38 mm |
Orientation | Normal |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS3 Macintosh |
File change date and time | 04:45, 1 November 2009 |
Y and C positioning | Co-sited |
Exposure Program | Normal program |
Exif version | 2.21 |
Date and time of digitizing | 18:58, 31 October 2009 |
Meaning of each component |
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Shutter speed | 7.3219299316406 |
APEX aperture | 6 |
Exposure bias | 2 |
Metering mode | Spot |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 3,959.3220338983 |
Focal plane Y resolution | 3,959.3220338983 |
Focal plane resolution unit | inches |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Manual white balance |
Scene capture type | Standard |
Supported Flashpix version | 1 |
Image width | 3,504 px |
Image height | 2,336 px |
Date metadata was last modified | 20:45, 31 October 2009 |