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The abundant concretions found in the Navajo Sandstone consist of sandstone cemented together by hematite (Fe 2 O 3), and goethite (FeOOH). The iron forming these concretions came from the breakdown of iron-bearing silicate minerals by weathering to form iron oxide coatings on other grains.
S P Crater is a cinder cone volcano 25 miles (40 km) north of Flagstaff, Arizona. [4] Saddle Crater; South Sheba Crater; Stewart Crater; Strawberry Crater; Sunset Crater is a cinder cone volcano in the San Francisco volcanic field, and a part of the Sunset Crater National Monument. [5] The Sproul
The giant, red concretions occurring in Theodore Roosevelt National Park, in North Dakota, are almost 3 m (9.8 ft) in diameter. [15] Spheroidal concretions, as large as 9 m (30 ft) in diameter, have been found eroding out of the Qasr el Sagha Formation within the Faiyum depression of Egypt. [ 16 ]
These ancient deformed rocks are found at the base of the Grand Canyon, in Salt River Canyon, and in mountain ranges throughout the state. Arizona's oldest rocks overall are metamorphosed volcanic rocks, including basalt and rhyolite and related sedimentary rocks, that now constitute the bottom of the Grand Canyon and formed beginning 1.8 ...
A recent geological survey conducted via drone revealed there is a wide and roughly 2-mile long crack running through the desert in Pinal County, Arizona, reports Fox News.. This isn't first giant ...
The Dia Art Foundation is continuing to advocate for the development of James Turrell's Roden Crater project in the Painted Desert in Arizona which was begun in the 1970s with Dia's support. [ 11 ] [ 12 ] James Turrell, who purchased the Roden Crater in 1979, had plans to open the crater for public viewing in 2011, [ 13 ] but now has ...
She found that the X's "were once part of a top-secret government program called CORONA — the nation's first reconnaissance satellite program," according to NPR.
The metal content of the iron meteorites found around the crater was valued at the time at US$125/ton, so Barringer was searching for a lode he believed to be worth more than a billion 1903 dollars. [32] "By 1928, Barringer had sunk the majority of his fortune into the crater – $500,000, or roughly $7 million in 2017 dollars."