File:Chert nodule 5.jpg
Jump to navigation
Jump to search
Size of this preview: 744 × 600 pixels. Other resolutions: 298 × 240 pixels | 596 × 480 pixels | 953 × 768 pixels | 1,270 × 1,024 pixels | 2,541 × 2,048 pixels | 2,991 × 2,411 pixels.
Original file (2,991 × 2,411 pixels, file size: 4.3 MB, MIME type: image/jpeg)
Captions
Captions
Add a one-line explanation of what this file represents
Summary
[edit]
| Description |
English: Chert is a microcrystalline to cryptocrystalline, quartzose sedimentary rock. It can be any color, is hard, breaks with conchoidal fracture, and has sharp, broken edges. Chert can be biogenic in origin, formed from the remains of once-living organisms that had siliceous skeletons (like hexactinellid sponges or radiolarians). It can also have a chemical origin, formed by precipitation from diagenetic or basinal fluids that have moved through rocks. Some cherts are altered, deeply-buried opalite or geyserite deposits. It has been hypothesized that certain chert occurrences are altered, eolian, quartzose silt deposits on ancient shallow seafloors.
Chert is also known as "flint" - the two terms are synonymous. Asserted differences between chert and flint include: 1) Chert is light-colored and flint is dark-colored. 2) Chert is chemical in origin and flint is biogenic in origin. 3) Chert is the name of the rock and flint is the name of an archaeological artifact (like an arrowhead) composed of chert. 4) Chert is low-quality, in terms of impurities, and flint is high-quality. |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/53530528100/ |
| 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@N05/53530528100. It was reviewed on 26 March 2024 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 | 19:52, 26 March 2024 | | 2,991 × 2,411 (4.3 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/53530528100/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
