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- An armored mud ball is a small sedimentary structure, formed in flowing water, which consists of a fragment of clay or mud that has been rolled by currents into a spherical shape, and which then becomes coated in a layer of sand, gravel or pebbles that serves to protect (armor) it against further breakdown. Armored mud balls can vary in size from less than a centimeters up to 50 centimeters in diameter. Typically, they are between 5 and 10 centimeters in diameter. Mud balls are known to form in many parts of the world, and armored mud balls can form in river, lake or marine environments. Under circumstances of rapid burial, armored mud balls can become incorporated into other sediments which subsequently form sedimentary rocks. Exposures of these lithified armored mud balls are very rare, but are known from a small number of locations around the world. (en)
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- 12040 (xsd:nonNegativeInteger)
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- Close-up of non-lithified armored mud ball (en)
- Non-lithified armored mud ball in Guadalupe Mountains National Park, 2015 (en)
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- Guadalupe mts AMB close up.png (en)
- Armored Mud Ball, Guadalupe Mts. Nat. Park, March 2015.png (en)
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- An armored mud ball is a small sedimentary structure, formed in flowing water, which consists of a fragment of clay or mud that has been rolled by currents into a spherical shape, and which then becomes coated in a layer of sand, gravel or pebbles that serves to protect (armor) it against further breakdown. Armored mud balls can vary in size from less than a centimeters up to 50 centimeters in diameter. Typically, they are between 5 and 10 centimeters in diameter. Mud balls are known to form in many parts of the world, and armored mud balls can form in river, lake or marine environments. (en)
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