| 释义 |
polymict, a. Petrol.|ˈpɒlɪmɪkt|
[f. poly- + Gr. µικτ-ός mixed, perh. after G. polymikt (H. Rosenbusch Elemente der Gesteinlehre (1898) 17).]
= polymictic a. 1.
[1931A. Johannsen Descr. Petrogr. Igneous Rocks I. i. 7 Rocks may be composed of a single mineral only..or they may be composed of aggregates of several minerals. The former are called monomineral rocks by Vogt and monomikt by Rosenbusch, and the latter polymikt by Rosenbusch.] 1952W. Wahl in Geochim. et Cosmochim. Acta II. 91 It is proposed to call..breccias in which the enclosed fragments are of a foreign material as compared with the surrounding principal mass of stone..‘polymict breccias’. 1958Proc. Geologists' Assoc. LXIX. 85 Two kinds of conglomerate are worth distinguishing, first the oligomict..and, second, the polymict, with a variety of pebbles of unstable rocks undergoing decay and most likely formed by rapid deposition of material worn quickly from high mountains. 1973Phil. Trans. R. Soc. A. CCLXXIII. 392 The conglomerates are characterized by the extreme polymict nature of the boulders, cobbles and pebbles. 1975Tindall & Thornhill Rock & Mineral Guide iii. 167 A rock with grains of various materials is polymict. |