File:Glacially striated boulder (Quarry Trails Park, Columbus, Ohio, USA) 2.jpg
Original file (4,000 × 3,000 pixels, file size: 16.12 MB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionGlacially striated boulder (Quarry Trails Park, Columbus, Ohio, USA) 2.jpg |
English: Glacial striations (glacial scratches) on a Pleistocene glacial clast in Ohio, USA.
Glaciers are rivers of ice. Ice is a mineral (H2O). Glacial ice is a rock (technically, a metamorphic rock). Despite being solid, ice does flow under certain conditions at the Earth’s surface. Occasionally, Earth experiences Ice Ages, during which extensive ice sheets cover and move over significant portions of the Earth’s surface. As ice moves over landmasses, it erodes underlying rocks and picks up small to large pieces of debris. This debris accumulates at the base of the ice sheet and scrapes bedrock as the glacier moves, resulting in glacial scratches (glacial striations) (= thin scratch lines on rock) and glacial grooves (= large channels incised in rock). The rock seen here is a Precambrian metamorphic derived from eastern Canada. It was delivered to Ohio by Pleistocene glaciers. The glacial scratches on its surface (upper right to lower left) were produced during the Late Pleistocene's Wisconsinan Glaciation. Locality: trailside, Quarry Trails Park, western side of Marblecliff Quarry (Marble Cliff Quarry), western side of Columbus, Franklin County, central Ohio, USA |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/51777906651/ |
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@N05/51777906651. It was reviewed on 3 January 2022 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
3 January 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 | 17:32, 3 January 2022 | 4,000 × 3,000 (16.12 MB) | Ɱ (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51777906651/ 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 | 1/320 sec (0.003125) |
F-number | f/2.8 |
ISO speed rating | 80 |
Date and time of data generation | 08:47, 17 December 2021 |
Lens focal length | 6.2 mm |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 18.0 (Macintosh) |
File change date and time | 00:56, 27 December 2021 |
Exif version | 2.21 |
Date and time of digitizing | 08:47, 17 December 2021 |
APEX shutter speed | 8.3128829536528 |
APEX aperture | 2.9708536585366 |
APEX exposure bias | −0.33333333333333 |
Maximum land aperture | 2.9708536585366 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 | 16,460.905405405 |
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 |
IIM version | 32,767 |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 19:56, 26 December 2021 |
Unique ID of original document | 2097B52A2BF937792BCD097ADBE8ED6D |