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NPS Photo by Carl Bowman Bass Limestone: Thickness: 260-300 feet
A number of different sedimentary rock types (such as conglomerate, dolomite and shale) occur within this light grey to brown formation. The Bass Limestone contains fossilized stromatolites, which are among the oldest fossils in the world. Their presence allows scientists to infer that the Bass Limestone was deposited in a warm and shallow sea environment.
|Source||Grand Canyon Supergroup_Stromatolites in Bass Limestone_0020|
|Author||Grand Canyon National Park|
|This file is licensed under the Creative Commons Attribution 2.0 Generic license.|
|This image was originally posted to Flickr by Grand Canyon NPS at https://flickr.com/photos/50693818@N08/8230702544. It was reviewed on by the FlickreviewR robot and was confirmed to be licensed under the terms of the cc-by-2.0.|
|Camera manufacturer||NIKON CORPORATION|
|Camera model||NIKON D50|
|Orientation of image||1|
|Image resolution in width direction||300|
|Image resolution in height direction||300|
|Unit of X and Y resolution||2|
|Exposure time||10/5000 sec (0.002)|
|F number||f / 11|
|ISO speed rating||200|
|Compressed bits per pixel||4|
|Lens focal length||50 mm|
|Date and time original image was generated||2009:10:09 14:36:14|
|Date and time image was made digital data||2009:10:09 14:36:14|
|Meaning of each component|
|Maximum lens aperture||4.5|
|Supported Flashpix version||0100|
|Color space information||1|
|Exif image width||3008|
|Exif image length||2000|