Precambrian-Pennsylvanian nonconformity (Red Rocks Park, west of Denver, Colorado, USA) 14 : 無料・フリー素材/写真
Precambrian-Pennsylvanian nonconformity (Red Rocks Park, west of Denver, Colorado, USA) 14 / 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 rocks at lower right are granitic gneisses and migmatites of the Idaho Springs Formation (late Paleoproterozoic, 1.7 billion years). The rocks at upper left are tilted, hematite-rich conglomerates, arkoses, and sandstones of the Fountain Formation (Pennsylvanian-Permian). 1.4 billion years of missing time are repesented at the unconformity.Unconformities are surfaces of erosion and/or non-deposition of sediments. Examples with sedimentary rocks overlying igneous or metamorphic rocks are called "nonconformities".Locality: Red Rocks Park, west of Denver, north-central Colorado, USA |
| 撮影日 | 2007-11-01 17:00:17 |
| 撮影者 | James St. John |
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