File:Symmetrical ripples in biogenic, aragonitic sand (shallow subtidal sefaloor just offshore from Sand Dollar Beach, nw San Salvador Island, eastern Bahamas) 1.jpg
![File:Symmetrical ripples in biogenic, aragonitic sand (shallow subtidal sefaloor just offshore from Sand Dollar Beach, nw San Salvador Island, eastern Bahamas) 1.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Symmetrical_ripples_in_biogenic%2C_aragonitic_sand_%28shallow_subtidal_sefaloor_just_offshore_from_Sand_Dollar_Beach%2C_nw_San_Salvador_Island%2C_eastern_Bahamas%29_1.jpg/800px-Symmetrical_ripples_in_biogenic%2C_aragonitic_sand_%28shallow_subtidal_sefaloor_just_offshore_from_Sand_Dollar_Beach%2C_nw_San_Salvador_Island%2C_eastern_Bahamas%29_1.jpg?20220423175528)
Original file (4,000 × 3,000 pixels, file size: 3.41 MB, MIME type: image/jpeg)
Captions
Captions
Summary
[edit]DescriptionSymmetrical ripples in biogenic, aragonitic sand (shallow subtidal sefaloor just offshore from Sand Dollar Beach, nw San Salvador Island, eastern Bahamas) 1.jpg |
English: Symmetrical ripples in the Bahamas.
Symmetrical ripples are moderately common sedimentary structures. In cross-section, when viewed perpendicular to the crests of the ripples, symmetrical ripple marks are more or less evenly shaped - they are symmetrical. Their presence in sedimentary rocks is diagnostic of deposition in a shallow water environment with a two-directional, back-and-forth (oscillatory) current. Symmetrical ripples marks are common in ancient shallow-water sandstone facies. The modern examples shown above are developed in biogenic, aragonitic (CaCO3), sand-size sediments next to a subtropical Bahamian island. Locality: shallow subtidal seafloor just offshore from Sand Dollar Beach, northwestern San Salvador Island, eastern Bahamas. |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/15047158025/ |
Author | James St. John |
Licensing
[edit]![w:en:Creative Commons](https://upload.wikimedia.org/wikipedia/commons/thumb/7/79/CC_some_rights_reserved.svg/90px-CC_some_rights_reserved.svg.png)
![attribution](https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Cc-by_new_white.svg/24px-Cc-by_new_white.svg.png)
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
![]() |
This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/15047158025. It was reviewed on 23 April 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
23 April 2022
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 17:55, 23 April 2022 | ![]() | 4,000 × 3,000 (3.41 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/15047158025/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
---|---|
Camera model | Canon PowerShot D10 |
Exposure time | 1/500 sec (0.002) |
F-number | f/8 |
ISO speed rating | 80 |
Date and time of data generation | 15:21, 19 March 2011 |
Lens focal length | 6.2 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop CS2 Macintosh |
File change date and time | 17:34, 26 August 2014 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 15:21, 19 March 2011 |
Meaning of each component |
|
Image compression mode | 3 |
APEX shutter speed | 8.96875 |
APEX aperture | 6 |
APEX exposure bias | 0 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, auto 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 | Auto exposure |
White balance | Manual white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |
Supported Flashpix version | 1 |
Image width | 4,000 px |
Image height | 3,000 px |
Date metadata was last modified | 13:34, 26 August 2014 |
IIM version | 2 |