Entrada Sandstone (Middle Jurassic; Goblin Valley, Utah, USA) 23 : 無料・フリー素材/写真
Entrada Sandstone (Middle Jurassic; Goblin Valley, Utah, USA) 23 / 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 | The Entrada Sandstone is a Jurassic-aged succession of redbeds, which are hematite-rich siliciclastic sedimentary rocks. Sediments were deposited in environments ranging from very shallow ocean (tidal flats) to sand dunes along ancient coastlines.The "goblins" of Utah's Goblin Valley formed by differential weathering and erosion - the harder sandstones weather and erode more slowly than the softer, finer-grained shales and siltstones.Stratigraphy: Entrada Sandstone, San Rafael Group, upper Middle JurassicLocality: Goblin Valley, east-central Utah, USA |
| 撮影日 | 2010-07-17 12:05:44 |
| 撮影者 | James St. John |
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