File:Bentonite (105.6 Ma) in the Dakota Sandstone (Lower Cretaceous) (Dinosaur Ridge, Colorado, USA) 5 (22022679749).jpg
Original file (4,000 × 3,000 pixels, file size: 3.87 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionBentonite (105.6 Ma) in the Dakota Sandstone (Lower Cretaceous) (Dinosaur Ridge, Colorado, USA) 5 (22022679749).jpg |
Bentonite horizon in the Cretaceous of Colorado, USA. The outcrop shown above is part of Dinosaur Ridge (a section of the Dakota Hogback), which is a north-south trending ridge of eastward-dipping Mesozoic sedimentary rocks. Triassic, Jurassic, and Cretaceous rocks are present, tilted by Laramide Orogeny uplift during the Cenozoic (the Front Range of the Colorado Rocky Mountains is immediately west of here). This exposure consists of structurally tilted beds of the Dakota Sandstone, a Lower Cretaceous succession of nearshore terrestrial to intertidal to shallow marine quartz sandstone deposits. The light-colored horizon with orangish-brown weathering stains is a bentonite, a lithified volcanic ash bed. Isotopic dating indicates that it is 105.6 million years old. Stratigraphy: Dakota Sandstone, Albian Stage, upper Lower Cretaceous Locality: near the crest of Dinosaur Ridge, between Interstate 70 and the town of Morrison, west of Denver, north-central Colorado, USA |
Date | |
Source | Bentonite (105.6 Ma) in the Dakota Sandstone (Lower Cretaceous) (Dinosaur Ridge, Colorado, USA) 5 |
Author | James St. John |
Licensing
[edit]- 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@N05/22022679749 (archive). It was reviewed on 1 December 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
1 December 2019
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 08:57, 1 December 2019 | 4,000 × 3,000 (3.87 MB) | Ser Amantio di Nicolao (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
The following page uses 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 | 1/320 sec (0.003125) |
F-number | f/8 |
ISO speed rating | 80 |
Date and time of data generation | 13:38, 16 July 2015 |
Lens focal length | 6.2 mm |
Image title | |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
|
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 13.0 (Macintosh) |
File change date and time | 00:09, 16 October 2015 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 13:38, 16 July 2015 |
Meaning of each component |
|
Image compression mode | 3 |
APEX shutter speed | 8.3125 |
APEX aperture | 6 |
APEX exposure bias | −0.33333333333333 |
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 | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 18:09, 15 October 2015 |
Unique ID of original document | F52923DF52C3994E68058D9262683E7C |