| 释义 |
radiolarite Geol.|reɪdɪəʊˈlɛəraɪt|
[a. F. radiolarite (F. Jaccard 1904, in Bull. des Laboratoires de Géol., etc. (Univ. of Lausanne) II. viii. 79): see Radiolaria n. pl. and -ite1.]
A type of homogeneous fine-grained siliceous sedimentary rock formed mainly from skeletal remains of radiolarians; also applied loosely to other sedimentary rocks similarly formed.
1910Proc. Sect. Sci. K. Akad. Wetensch. te Amsterdam XII. 141 In the year 1894 I [sc. G. A. F. Molengraaff] discovered in the basin of the Upper Kapoewas in Western Borneo cherts and hornstones, consisting almost entirely of tests of Radiolaria, which I described as deep-sea deposits. Such rocks are also known as Radiolarite. 1924J. G. A. Skerl tr. Wegener's Orig. Continents & Oceans ii. 20 The practically non-calcareous ‘radiolarites’ of the Alps. 1938Hatch & Rastall Petrol. of Sedimentary Rocks (ed. 3) x. 203 In Great Britain, two principal types of radiolarite may be distinguished, one represented by the jaspers and jasper-like cherts, and the other by the culm type of chert. 1945M. F. Glaessner Princ. Micropalaeont. ii. 11 Radiolarite- and serpentine-zones in close association form important structural elements in many folded zones of different age. 1972Gloss. Geol. (Amer. Geol. Inst.) 587/1 Radiolarite,..(a) the comparatively hard, very fine-grained, chert-like, homogeneous, consolidated equivalent of radiolarian earth. (b) Indurated radiolarian ooze. (c) A term that is often applied as a syn. of radiolarian earth. 1977A. Hallam Planet Earth 254/1 Ancient radiolarian-rich sediments are known as radiolarites, and many of these are believed to be deep-water deposits. |