Columbus Canyon (Colorado National Monument, Colorado, USA) 2 : 無料・フリー素材/写真
Columbus Canyon (Colorado National Monument, Colorado, 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 | Colorado National Monument is a colorful and scenic park just southwest of the town of Grand Junction in western Colorado, USA. It's located in the northeastern part of the Colorado Plateau Physiographic Province, a large section of continental crust that was significant uplifted during the Cenozoic. The rocks in the park are gently folded into a large monocline that has been erosionally dissected into a series of dramatic canyons.The above photo shows outcrops of Mesozoic sedimentary rocks over Precambrian metamorphic rocks in Columbus Canyon. The dark gray-colored rocks in the canyon floor are gneisses and schists of the Black Canyon Formation (Paleoproterozoic, 1.759 Ga), the local basement rock unit. The reddish-colored slope above that (partly to mostly covered light brown talus) is hematitic shales and siltstones of the Chinle Formation (Upper Triassic). The cliff-forming unit above that is the Wingate Sandstone (Lower Jurassic), an eolian quartzose sandstone interval deposited in an ancient sand dune field.Locality: Columbus Canyon (view from Cold Shivers Point), southeastern Colorado National Monument, southwest of the town of Grand Junction, west-central Mesa County, far-western Colorado, USA |
| 撮影日 | 2012-06-11 12:02:36 |
| 撮影者 | James St. John |
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