Definition of mudstone
: an indurated shale produced by the consolidation of mud
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Recent Examples of mudstone from the Web
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The Murray formation is a rocky outcrop with characteristic bands of mudstone, possibly laid down by lakes of liquid water.
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Curiosity has found evidence of ancient lakes in older, lower-lying rock layers and also in younger mudstone that is above Old Soaker.
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The road sits on the Franciscan formation, a stretch of marine sedimentary rocks and minerals like sandstone, mudstone, and salt smashed against the Northern American plate to form the coastline.
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The photo above and to the right is a succession of alternating sandstone beds and mudstone beds (note trees for scale).
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Made from small pieces of shale or mudstone, each bead had to be ground into a disc roughly half the size of an aspirin, then drilled with a hole.
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This analysis of the Murray formation required taking many samples of the mudstone, but doing them would take time away from other experiments and observations.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'mudstone.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
First Known Use of mudstone
circa 1736
Learn More about mudstone
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See words that rhyme with mudstone Britannica.com: Encyclopedia article about mudstone
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