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  2. Redwall Limestone - Wikipedia

    en.wikipedia.org/wiki/Redwall_Limestone

    The Redwall Limestone is an erosion-resistant, Mississippian age, cliff-forming geological formation that forms prominent, red-stained cliffs in the Grand Canyon. these cliffs range in height from 150 m (490 ft) to 244 m (801 ft).

  3. Surprise Canyon Formation - Wikipedia

    en.wikipedia.org/wiki/Surprise_Canyon_Formation

    This left the former seafloor and upper surface of the Redwall Limestone subaerially exposed as a tropical sinkhole plain drained by west-trending, low-gradient rivers. The channels of these rivers and their tributaries eroded major drainage valleys that cut into the sinkhole plain as deep as 122 m (400 ft), 2/3 of the thickness of the Redwall ...

  4. Tonto Group - Wikipedia

    en.wikipedia.org/wiki/Tonto_Group

    Vertical erosion in cliff of Redwall Limestone, upon horizontal Muav Limestone cliff. [19] The Tapeats Sandstone sits in foreground on Granite Gorge , and is seen as thinly-bedded. The slope-former above is the (dull-greenish)-Bright Angel Shale with thin, inter-bedding, as well as one resistant cliff unit.

  5. Geology of the Grand Canyon area - Wikipedia

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

    Muav Limestone averages 505 million years old and is made of gray, thin-bedded limestone that was deposited farther offshore from calcium carbonate precipitates (see 3c in figure 1). [11] The western part of the canyon has a much thicker sequence of Muav than the eastern part. [32] The Muav is a cliff-former, 136 to 827 feet (41 to 252 m) thick ...

  6. Bright Angel Shale - Wikipedia

    en.wikipedia.org/wiki/Bright_Angel_Shale

    The units of the Tonto Group and the colorful Bright Angel Shale are easily identified as a geological sequence beneath the tall cliffs of the Redwall Limestone (the Redwall sits upon a short resistant cliff of Muav Limestone); the Tonto Group is also easily seen beside Granite Gorge of the Colorado River and the Vishnu Basement Rocks

  7. 'Disturbing actions': Arizona man sentenced to prison for ...

    www.aol.com/disturbing-actions-arizona-man...

    A 36-year-old Arizona man has been sentenced to nearly four years in prison for illegally owning guns and for filming himself torturing and killing pigeons, some by burning their eyes with a torch ...

  8. Frenchman Mountain Dolostone - Wikipedia

    en.wikipedia.org/wiki/Frenchman_Mountain_Dolostone

    This action created an informal formation-rank geologic unit composed entirely of dolomite that overlies the limestone beds of the Muav Limestone. [8] As discussed in detail by S. M. Rowland and others, [ 3 ] Between 1945 and 2020, the Cambrian undifferentiated dolomites have also been informally referred to as either the supra-Muav , Grand ...

  9. Drew Barrymore on Aging and Turning 50 Today - AOL

    www.aol.com/drew-barrymore-aging-turning-50...

    The Drew Barrymore Show host is turning 50 years old on February 22, and she recently spoke out about what entering a new decade of life means to her.

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