File:Uraniferous, pyritic, quartz-pebble conglomerate 3.jpg
Jump to navigation
Jump to search
Size of this preview: 723 × 600 pixels. Other resolutions: 289 × 240 pixels | 579 × 480 pixels | 926 × 768 pixels | 1,234 × 1,024 pixels | 2,468 × 2,048 pixels | 3,061 × 2,540 pixels.
Original file (3,061 × 2,540 pixels, file size: 6.97 MB, MIME type: image/jpeg)
Captions
Captions
Add a one-line explanation of what this file represents
Summary
[edit]
| Description |
English: This rock does not have a label, but it's a crack sample of quartz-pebble conglomerate with detrital pyrite grains between the quartz pebbles (click on the photo once or twice to zoom in & see the brassy gold-colored pyrite). Detrital pyrite only occurred at Earth's surface in the early Precambrian, when the atmosphere had little to no free oxygen gas (O2). This rock is also radioactive - it contains uranium (probably detrital uraninite, UO2). Detrital pyrite and uraninite are classic pieces of geologic evidence for the lack of oxygen in early air.
I suspect this sample comes from South Africa's Witwatersrand Group. If so, the rock may also be a gold ore. |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/51191159703/ |
| Author | James St. John |
Licensing
[edit]
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@N05/51191159703. It was reviewed on 20 May 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 | 16:47, 20 May 2021 | | 3,061 × 2,540 (6.97 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51191159703/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
