File:Agate (Tertiary; Agate Bay, King George Island, South Shetland Islands) 1.jpg
Original file (2,283 × 1,508 pixels, file size: 2.42 MB, MIME type: image/jpeg)
Captions
Captions
Summary[edit]
_1.jpg&action=edit§ion=1){kind=link}
| Description |
English: Agate from the Tertiary of Antarctica. (~3.8 centimeters across at its widest)
"Agate" is a rockhound/collector term for cavities in rocks (usually sedimentary rocks such as limestone or igneous rocks such as basalt) that have been partially or completely filled with irregularly concentric layers of microcrystalline, fibrous quartz (chalcedony - SiO2). Agate is quartz. The Antarctic agate seen here is from King George Island in the South Shetland Islands. Geologically, the South Shetlands are part of the Antarctic Peninsula, but have been separated by back-arc rifting, which formed the Bransfield Basin (Bransfield Strait). The agate is a cavity filling derived from Tertiary-aged volcanic rocks on the island - principally basalt and andesite lava flows. In Admiralty Bay, the Agat Point Dike, composed of basaltic andesite, also contains agate masses. Locality: Agate Bay, King George Island, South Shetland Islands, north of the Antarctic Peninsula |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/50886045592/ |
| Author | James St. John |
Licensing[edit]
_1.jpg&action=edit§ion=2){kind=link}
- 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@N05/50886045592. It was reviewed on 2 February 2021 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 | 16:33, 2 February 2021 | | 2,283 × 1,508 (2.42 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/50886045592/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
_1.jpg&oldid=786100855){kind=link}