File:Flint-knapped spearpoint (Flint River Chert, Oligocene; near Albany, Georgia, USA) 3.jpg
Original file (1,400 × 3,587 pixels, file size: 3.05 MB, MIME type: image/jpeg)
Captions
Captions
Summary[edit]
_3.jpg&action=edit§ion=1){kind=link}
| Description |
English: Flint-knapped spearpoint from the Oligocene of Georgia, USA. (~11.3 centimeters tall)
Knapper: Ronnie Miller "Flint" is sometimes used as a lithologic term by modern geologists, but it is a synonym for chert. Flint and chert are the same - they are cryptocrystalline, quartzose sedimentary rocks. Rockhounds often assert that flint is high-quality while chert is low-quality. Some geologists assert that "flint" implies a biogenic origin and "chert" implies a chemical origin. Many cherts do have a chemical origin - chert nodules are moderately common in some limestone units. The nodules form during diagenesis - pre-existing silica components in the carbonate sediments are dissolved, mobilized, and reprecipitated as chert masses. Some cherts do have a biogenic origin - for example, radiolarian cherts (rich in radiolarian microfossils) or spicular cherts (rich in siliceous sponge spicules). Seen here is a knapped spearpoint - it's a modern replica. The rock is "Flint River Chert", derived from the "Flint River Formation" in Georgia. Oligocene-aged fossils have been reported from the fossiliferous chert component of the unit. Stratigraphy: chert clast in the "Flint River Formation", Oligocene Locality: unrecorded/undisclosed site at or near the town of Albany, southern Georgia, USA |
| Date | |
| Source | https://www.flickr.com/photos/47445767@N05/51432847390/ |
| Author | James St. John |
Licensing[edit]
_3.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@N05/51432847390. It was reviewed on 7 September 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 | 14:40, 7 September 2021 | | 1,400 × 3,587 (3.05 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/51432847390/ with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
_3.jpg&oldid=879506425){kind=link}