Fossil palm fronds in vertically tilted sandstone (Laramie Formation, upper Upper Cretaceous; Parfet Prehistoric Preserve, Golden, Colorado, USA) 1 : 無料・フリー素材/写真
Fossil palm fronds in vertically tilted sandstone (Laramie Formation, upper Upper Cretaceous; Parfet Prehistoric Preserve, Golden, Colorado, 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 | Fossil palm fronds in sandstone in the Cretaceous of Colorado, USA.Seen here is the underside of a vertically-oriented, nonmarine sandstone bed in Golden, Colorado. The radiating, striated structures in the rock are fossil palm fronds. The rocks at this site were tectonically tilted during the Laramide Orogeny, an ancient mountain-building event that resulted in the formation of the true Rocky Mountains. Other fossils in the rocks here include dinosaur footprints and bird tracks.Stratigraphy: Laramie Formation, Maastrichtian Stage, upper Upper CretaceousLocality: outcrop along Triceratops Trail, Parfet Prehistoric Preserve, southern side of the town of Golden, Colorado, USA (~vicinity of 39° 44' 35.24" North latitude, 105° 13’ 09.69" West longitude) |
| 撮影日 | 2007-07-25 16:13:00 |
| 撮影者 | James St. John |
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