|  bisher 624 mal gesehen | | Zurück zum Bericht | alle Bilder dieser Serie | alle Bilder dieses Autors |  Foto | Foto 34 von 34 | Bild vor |  | Upheaval Dome is a striking geologic structure in the Canyonlands National Park of southern Utah. Viewed from directly above (and on geologic maps), the alternating rock layers make a nearly circular, 5.5-kilometer- (3.4-mile-) diameter “bull’s-eye.” The oldest rocks are in the center (Chinle and Moenkopi Formations, with limited exposures of even older rocks), and progressively younger rocks are exposed farther out: Wingate Sandstone, Kayenta Formation, and Navajo Sandstone (in order of decreasing age). This kind of rock formation—a fold in the Earth’s crust in which the rocks slope downward from either side of a central point—is called an anticline. If the exposed rock layers form a closed circle at the surface, the anticline is called a dome. It is typical of these formations for the central rocks to be the oldest.
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| | Aktueller Bericht: Die schönsten Bilder der Erde | | Autor des Berichts: Mark Peters | | erstellt: 07.02.2008 | | bisher gesehen: 624 mal | | Stichworte: ERde |
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