ooid Petrol.
(ˈəʊɔɪd)
[a. G. ooid (E. Kalkowsky 1908, in Zeitschr. f. deutsch. geol. Ges. LX. 72), f. Gr. {wlenisisub}οειδής egg-shaped.]
= oolith.
| [1918 Jrnl. Geol. XXVI. 593 For an individual grain of an oölite the term ‘ovulite’.. appears to be preferable to Kalkowsky's ‘oöid’.] 1945 Univ. Texas Publ. No. 4301. 136/1 Oöid, the individual tiny spheroid in an oölitic rock. 1949 H. W. Fairbairn Struct. Petrol. Deformed Rocks (ed. 2) iii. 49 Early structural studies of ooids include those of Albert Heim and Loretz. 1965 J. T. Greensmith Hatch & Rastall's Petrol. Sedimentary Rocks (ed. 4) viii. 199 A normal oolitic limestone or oolitic calcarenite is made up of an aggregate of spherical allochems called ooliths or ooids, usually about 1 mm. or less in diameter. 1974 Nature 15 Feb. 452/1 The formation is mainly dolomitic... It contains desiccation cracks,..oöids and algal stromatolites. |