| 单词 |
felsite |
| 释义 |
felsite Min.|ˈfɛlsaɪt|
[f. fels (in felspar feldspar) + -ite.
The name was given by Kirwan himself (not by Widenmann as his language might seem to imply), and its form is due to his erroneous explanation of feldspath (see feldspar).]
= felstone.
1794Kirwan Min. I. 326 Felsite, or compact Felspar of Widenmann. 1804Edin. Rev. III. 310 Kirwan..has called a substance in question Felsite, and not compact fieldstone. 1868Dana Min. §315 (1880) 352 Felsite..constitutes the base of albite porphyry. 1882W. J. Harrison in Knowledge 6 Oct. 305 A cream-coloured felsite.
attrib., as in felsite porphyry (see quot.).
1877Le Conte Elem. Geol. ii. (1879) 206 Felsite porphyry..consists of a grayish or reddish feldspathic mass, containing large crystals of lighter colored and purer feldspar.
Hence felˈsitic a., consisting of or containing felsite or felstone.
1879Prof. Hughes in Q. Jrnl. Geol. Soc. XXXV. 682 The Felsitic series, consisting chiefly of quartz felsites and probably also of volcanic origin. 1880Rudler in Encycl. Brit. (ed. 9) XI. 49 Crystals of orthoclase disseminated through a felsitic matrix. In these veins the granite is apt to..become either fine-grained or felsitic. |
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