Flint artifacts (Upper Mercer Flint, Pennsylvanian; Ohio, USA) 1 : 無料・フリー素材/写真
Flint artifacts (Upper Mercer Flint, Pennsylvanian; Ohio, USA) 1 / James St. John
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | (public display, Geology Department, Wittenberg University, Springfield, Ohio, USA)------------------------------------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.---------------------------------From exhibit signage:Upper Mercer FlintThis distinctive blue-grey to black mottled flint is another variety of flint used by Ohio's prehistoric Indians to manufacture points, knives, scrapers, and other tools.--------------------------------- |
| 撮影日 | 2018-03-24 12:31:07 |
| 撮影者 | James St. John |
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