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  2. Geology of the Grand Canyon area - Wikipedia

    en.wikipedia.org/wiki/Geology_of_the_Grand...

    The resulting Grand Canyon Supergroup of sedimentary units is composed of nine varied geologic formations that were laid down from 1.2 billion and 740 million years ago in this sea. [11] Good exposures of the supergroup can be seen in eastern Grand Canyon in the Inner Gorge and from Desert View, Lipan Point and Moran point. [12] [note 1]

  3. Geology of Arizona - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Arizona

    The Mesoproterozoic formations in the Grand Canyon are overlain by the 850 million year old, Neoproterozoic Chuar Group and Sixtymile Formation sedimentary rocks. The Great Unconformity is a famous gap in the stratigraphic record of the Grand Canyon of 900 million years between Proterozoic granitic rocks and Cambrian marine sediments. For the ...

  4. Geology of the Zion and Kolob canyons area - Wikipedia

    en.wikipedia.org/wiki/Geology_of_the_Zion_and...

    Kolob Canyons from the end of Kolob Canyons Road. Stream erosion has incised the Kolob Plateau to form canyons that expose the red-orange colored Navajo Sandstone and other formations. The geology of the Zion and Kolob canyons area includes nine known exposed formations, all visible in Zion National Park in the U.S. state of Utah.

  5. Glen Canyon Group - Wikipedia

    en.wikipedia.org/wiki/Glen_Canyon_Group

    The Glen Canyon Group is a geologic group of formations that is spread across the U.S. states of Nevada, Utah, northern Arizona, north west New Mexico and western Colorado. It is called the Glen Canyon Sandstone in the Green River Basin of Colorado and Utah.

  6. Canyon - Wikipedia

    en.wikipedia.org/wiki/Canyon

    A box canyon is a small canyon that is generally shorter and narrower than a river canyon, with steep walls on three sides, allowing access and egress only through the mouth of the canyon. Box canyons were frequently used in the western United States as convenient corrals, with their entrances fenced.

  7. Two Grand Canyon-size valleys on the far side of the moon ...

    www.aol.com/two-grand-canyon-size-valleys...

    Two Grand Canyon-size features on the far side of the moon were likely formed in about 10 minutes after an unknown object slammed into the moon 3.8 billion years ago.

  8. Rock (geology) - Wikipedia

    en.wikipedia.org/wiki/Rock_(geology)

    Metamorphic rocks are formed by subjecting any rock type—sedimentary rock, igneous rock or another older metamorphic rock—to different temperature and pressure conditions than those in which the original rock was formed. This process is called metamorphism, meaning to "change in form". The result is a profound change in physical properties ...

  9. Geology of the Canyonlands area - Wikipedia

    en.wikipedia.org/wiki/Geology_of_the_Canyonlands...

    Coastal lowlands returned to the area after the sea regressed (retreated), forming the Elephant Canyon Formation. These formations can now be seen in Cataract and Elephant Canyons. White Rim Sandstone overlaying Organ Rock Shale, Canyonlands, Utah. The Uncompahgre Mountains (Uncompahgre Plateau) were undergoing extensive erosion during this time.