Limestone fluorescing (Madison Limestone, Mississippian; Uintah County, Utah, USA) 2 : 無料・フリー素材/写真
Limestone fluorescing (Madison Limestone, Mississippian; Uintah County, Utah, USA) 2 / 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 | Limestone from the Mississippian of Utah fluorescing under ultraviolet light. (public display, Utah Field House of Natural History, Vernal, Utah, USA)Limestone is a biogenic sedimentary rock composed of calcite. Most limestones were originally deposited in warm, shallow ocean environments.Why do some rocks, minerals, and fossils fluoresce under ultraviolet black light (UV)? When atoms are bombarded by short-wavelength UV radiation, long-wavelength UV radiation, or x-rays, electron excitation occurs, but the electrons do not remain in an energetically excited state. They quickly give off energy and resume their normal energy levels. If the electron energy release is in the visible spectrum of light, a mineral glows, or fluoresces.Stratigraphy: Madison Limestone, MississippianLocality: Uintah County, northeastern Utah, USA |
| 撮影日 | 2012-06-10 09:42:58 |
| 撮影者 | James St. John |
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