: a rock composed chiefly of silt hardened by heat, pressure, or cementation
Examples of siltstone in a Sentence
Recent Examples on the WebThe reddish-brown siltstone, orange sandstone, and green clay stone are eroded into intricate swirls, icicles, cones, and rounded rec rooms.
John Phillips, Car and Driver, 24 Mar. 2020
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'siltstone.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.