| 单词 | cone-in-cone |
| 释义 | > as lemmascone-in-cone cone-in-cone n. a peculiar geological structure, presenting the appearance of a number of cones one packed inside another. ΘΚΠ the world > the earth > structure of the earth > structural features > rock formations > [noun] > cone or cone-in-cone cone-in-cone1877 cone-sheet1924 shatter cone1933 1877 Encycl. Brit. VI. 45/2 Coal is perfectly amorphous, the nearest approach to anything like crystalline structure being a compound fibrous grouping resembling that of gypsum or arragonite, which occurs in some of the steam coals of S. Wales, and is locally known as ‘cone in cone’. 1882 A. Geikie Text-bk. Geol. 313 That the more complex structure known as ‘Cone in cone’ may be due to the action of pressure upon concretions in the course of formation. 1883 W. S. Gresley Gloss. Terms Coal Mining 61 Steam or anthracite coal exhibiting a peculiar fibrous structure passing into a singular toothed arrangement of the particles called cone-in-cone coal or crystallised coal. 1921 Brit. Mus. Return 156 Cone-in-cone structure from Barf Hill, Keswick. 1954 G. W. Himus Dict. Geol. 30 Cone-in-cone structure, a concretionary structure, found in marls, ironstones, coals, etc., consisting of the development of a succession of concentric cones, resulting from radial crystallization about a common axis. < as lemmas |
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