Argillaceous

//ɑːd͡ʒɪlˈeɪʃəs//

"Argillaceous" in a Sentence (2 examples)

[…] natural colossi from two to five hundred feet high, done in argillaceous sandstone or a singular species of conglomerate, all of which owe their existence almost entirely to the agency of wind.

The gleam of the land is in its rocks, the fine-grained argillaceous rocks, here, not purple or grey, but green of living stone.

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