lithomarge Geol.
(ˈlɪθəmɑːdʒ)
Also in L. form lithomarga.
[ad. mod.L. lithomarga, f. Gr. λίθο-ς stone + L. marga marl.]
‘An early name for several kinds of soft clay-like minerals, including kaolin’ (A. H. Chester 1896).
| 1753 Chambers Cycl. Supp., Lithomarga. 1784 Kirwan Min. 74 Lithomarga or stone marl. 1815 W. Phillips Outl. Min. & Geol. (1818) 138 A Quartzose rock..composed of quartz, schorl, beryl and lithomarga. 1820 R. Jameson Min. II. 74 There are two kinds, viz. Friable Lithomarge, and Indurated Lithomarge. 1843 Portlock Geol. 210 Lithomarge of greenish-white colour..at Dunluce. 1870 Athenæum 14 May 646 Restormelite is a variety of kaolinite, standing nearest to the lithomarge group. |