Definition of mudstone
: an indurated shale produced by the consolidation of mud
Recent Examples of mudstone from the Web
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.
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.
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.
Curiosity has found evidence of ancient lakes in older, lower-lying rock layers and also in younger mudstone that is above Old Soaker.
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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