File:Glacially-striated granite (Cadillac Mountain Granite, Silurian-Devonian boundary times, ~419 Ma; summit of South Bubble, Acadia National Park, Maine, USA) 4.jpg
Jump to navigation
Jump to search
Size of this preview: 800 × 532 pixels. Other resolutions: 320 × 213 pixels | 640 × 426 pixels | 1,024 × 681 pixels | 1,280 × 851 pixels | 3,008 × 2,000 pixels.
Original file (3,008 × 2,000 pixels, file size: 5.53 MB, MIME type: image/jpeg)
Captions
Captions
Add a one-line explanation of what this file represents
Summary[edit]
_4.jpg&action=edit§ion=1){kind=link}
| Description |
English: Glaciers are rivers of ice. Ice is a mineral (H2O) and glacial ice is a 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 Late Pleistocene glacial striations seen here are developed on a granite surface atop a roche moutonnée in coastal Maine. The rock itself is part of the Cadillac Mountain Granite, a large pluton dating to about 419 million years ago. Locality: summit of South Bubble (a roche moutonnée), Acadia National Park, Mt. Desert Island, southern-coastal Maine, USA |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/50603374713/ |
| Author | James St. John |
Licensing[edit]
_4.jpg&action=edit§ion=2){kind=link}
This file is licensed under the Creative Commons Attribution 2.0 Generic license.
- 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@N05/50603374713. It was reviewed on 18 November 2020 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 00:59, 18 November 2020 | | 3,008 × 2,000 (5.53 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50603374713/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
_4.jpg&oldid=683446713){kind=link}