pelite Geol.
(ˈpiːlaɪt)
[f. Gr. πηλ-ός clay, earth, mud + -ite1.]
A rock composed of an argillaceous sediment.
| 1879 Rutley Study Rocks xiv. 299 The psammites and pelites..are respectively represented by the various sand⁓stones, arkose, etc., and by the tuffs. |