Marble (Murphy Marble, Ordovician; quarry near Tate, Georgia, USA) 2 : 無料・フリー素材/写真
Marble (Murphy Marble, Ordovician; quarry near Tate, Georgia, 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 | Mable from the Ordovician of Georgia, USA.Marble is a moderately common, crystalline-textured metamorphic rock composed of calcite (CaCO3 - calcium carbonate). It forms by intermediate- to high-grade metamorphism of limestone. Marble varies in color and crystal size, but is reliably identified by its crystalline texture, by bubbling in acid, and by not scratching glass (marble has a hardness of 3, while glass has a hardness of 5.5).The marble seen here was originally a Cambrian limestone. It was regionally metamorphosed during the Ordovician Taconic Orogeny.Geologic unit & age: Murphy Marble, Ordovician metamorphic ageLocality: unrecorded / undisclosed site at or near the town of Tate (probably a marble quarry), Pickens County, northern Georgia, USA |
| 撮影日 | 2023-11-03 15:37:37 |
| 撮影者 | James St. John |
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