“trachytoid”的英文意思_释义_用法

单词

trachytoid

释义

trachytoid, a.|ˈtrækɪtɔɪd, ˈtreɪkɪ-|
[f. as prec. + -oid, after F. trachytoïde.]
Resembling or allied to trachyte.
1885Geikie Text-bk. Geol. ii. ii. v. (ed. 2) 110 note, For this [semi-crystalline] structure the term ‘mixed’ has been proposed, as being a mixture of the crystalline and amorphous (glassy) structures. It has been designated by Fouqué and Michel-Lévy ‘trachytoid’, as being typically developed among the trachytes.Ibid. vii. 137 Two leading types of structure are recognised by these authors among the eruptive rocks. 1. Granitoid... 2. Trachytoid, distinguished by a more marked contrast between the crystals of the first and second consolidation, the usual presence of an amorphous magma, and the fluxion structure.

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