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mudstone |
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mudstone [′məd‚stōn] (geology) An indurated equivalent of mud in the form of a blocky or massive, fine-grained sedimentary rock containing approximately equal proportions of silt and clay; lacks the fine lamination or fissility of shale. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The deposits occur 20 to 40 m above the unconformity and are associated with a sequence of mudstone and siltstone. The rock here, called Claron Formation, features striations of limestone, sandstone and mudstone, with various minerals contributing the colors of an artist's palette. Three miles out, at the foot of a 15-m (50-ft) cliff, she spies dark brown fragments of fossilized bone amid gray mudstone (rock made of mud or silt) and yellowish sandstone (rock made of sand). |
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