File:Flint arrowheads (farms near Tipp City, Ohio, USA).jpg
Original file (3,219 × 1,496 pixels, file size: 2.33 MB, MIME type: image/jpeg)
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Summary
[edit]DescriptionFlint arrowheads (farms near Tipp City, Ohio, USA).jpg |
English: (specimen at far left is ~5.1 centimeters tall)
These are American Indian artifacts. Such objects are relatively common and have been collected for many years. Traditionally, the best collecting sites are plowed farmers' fields. Arrowheads, spearpoints, scrapers, and knives were made from a variety of specific materials, but chert ("flint") was the most commonly used. Chert/flint is a cryptocrystalline, quartzose sedimentary rock. Other materials include obsidian, a black-colored, glassy-textured, extrusive igneous rock. Scarce arrowhead compositions include crystalline quartz. Several flint horizons in Ohio were exploited by prehistoric people. The three most significant were the Vanport Flint, the Upper Mercer Flint, and the Zaleski Flint. I don't recognize this particular brown chert, in terms of geologic provenance. Locality: unspecified farmlands near the town of Tipp City, western Ohio, USA |
Date | |
Source | https://www.flickr.com/photos/47445767@N05/49386890656/ |
Author | James St. John |
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This image was originally posted to Flickr by James St. John at https://flickr.com/photos/47445767@N05/49386890656. 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. |
18 November 2020
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 01:32, 18 November 2020 | 3,219 × 1,496 (2.33 MB) | Ser Amantio di Nicolao (talk | contribs) | Uploaded a work by James St. John from https://www.flickr.com/photos/47445767@N05/49386890656/ with UploadWizard |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot D10 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/9 |
ISO speed rating | 80 |
Date and time of data generation | 17:18, 14 January 2020 |
Lens focal length | 8.295 mm |
Width | 4,000 px |
Height | 3,000 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
Software used | Adobe Photoshop Elements 16.0 (Macintosh) |
File change date and time | 18:23, 14 January 2020 |
Y and C positioning | Co-sited |
Exif version | 2.21 |
Date and time of digitizing | 17:18, 14 January 2020 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 5.90625 |
APEX aperture | 6.34375 |
APEX exposure bias | −0.66666666666667 |
Maximum land aperture | 3.34375 APEX (f/3.19) |
Metering mode | Pattern |
Flash | Flash fired, auto mode, red-eye reduction mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 16,460.905349794 |
Focal plane Y resolution | 16,483.516483516 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Manual exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Portrait |
Lens used | 6.2-18.6 mm |
Date metadata was last modified | 13:23, 14 January 2020 |
Unique ID of original document | 6BA84C3F2FEC4A3C991A7AD7353F6077 |
IIM version | 18,755 |