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1 Οκτ 2024 · Grand Canyon is perhaps the best example of a water-carved canyon. Water has tremendous erosive power, particularly when carrying large amounts of sediment and rock, like the Colorado River does when flooding.
- Geologic Formations
Grand Canyon’s excellent display of layered rock is...
- Natural Features & Ecosystems
Geologic formations such as gneiss and schist found at the...
- Geologic Formations
5 ημέρες πριν · Grand Canyon, immense canyon cut by the Colorado River in the high plateau region of northwestern Arizona, U.S., noted for its fantastic shapes and coloration. The greatest depths of the Grand Canyon lie more than a mile below its rim.
The Grand Canyon tells one of the world’s greatest geologic stories. Its distinctive features allow researchers to piece together the history of this unique location, one of America’s treasures and a UNESCO World Heritage Site.
The geology of the Grand Canyon area includes one of the most complete and studied sequences of rock on Earth. The nearly 40 major sedimentary rock layers exposed in the Grand Canyon and in the Grand Canyon National Park area range in age from about 200 million to nearly 2 billion years old.
The major geologic exposures in the Grand Canyon range in age from the two-billion-year-old Vishnu Schist at the bottom of the Inner Gorge to the 270-million-year-old Kaibab Limestone on the Rim. There is a gap of about a billion years between 1.75 billion and 1.25 billion years ago.
4 Μαρ 2019 · Grand Canyon’s excellent display of layered rock is invaluable in unraveling the region’s geologic history. Extensive carving of the plateaus allows for the detailed study of the Earth's movements.
4 Δεκ 2022 · Geologic formations such as gneiss and schist found at the bottom of the Canyon date back 1,800 million years. This geologic incline creates a diversity of biotic communities, and five of the seven life zones are present in the park.
