Iron Dike Gabbro (Hidden Valley, Rocky Mountains National Park, Colorado, USA) 1 : 無料・フリー素材/写真
Iron Dike Gabbro (Hidden Valley, Rocky Mountains National Park, 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 | Rocky Mountains National Park (misnamed “Rocky Mountain National Park” by the American federal government) is part of Colorado's Front Range. The mountains in this area are part of the true Rocky Mountains (not all mts. in western North America are the “Rockies”). The American Rockies are subdivided into three physiographic provinces. This park is part of the Southern Rocky Mountains Physiographic Province, which has mountain ranges cored by Precambrian-aged igneous and metamorphic rocks.The band of scattered, brown-colored rock outcrops seen above is the Iron Dike. It is a true igneous dike - a planar intrusion that cuts across surrounding country rocks. It consists of the Iron Dike Gabbro, a Mesoproterozoic-aged (1.316 Ga) ferrogabbro.Locality: Iron Dike, Hidden Valley, northern Rocky Mountains National Park, northern Colorado, USA |
| 撮影日 | 2012-12-16 15:00:07 |
| 撮影者 | James St. John |
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