Example Sentences

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Both plagioclastic and orthoclastic aventurine occur at several localities in the United States.

From Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon" by Various

There are consequently two series of felspars, one termed orthoclastic or orthotomous, and the other plagioclastic or clinotomous.

From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 2 "Fairbanks, Erastus" to "Fens" by Various

Orthoclase is orthoclastic and monoclinic; all the other feldspars are plagioclastic and triclinic.

From The Student's Elements of Geology by Lyell, Charles, Sir