| 释义 |
felstone Min.|ˈfɛlstəʊn|
[ad. Ger. felsstein, f. fels rock + stein stone. By early German mineralogists used vaguely for amorphous rocks; association with felsite has given it a more restricted meaning.]
(See quot. 1865.)
1858Geikie Hist. Boulder xii. 240 Traps..consisting..of felspar, whence they are known as felstones. 1865Page Handbk. Geol. Terms (ed. 2), Felstone, the term now generally employed by geologists to designate compact felspar which occurs in amorphous rock-masses..The term Felsite was at one time employed for the same purpose, but is now all but obsolete. 1875J. Croll Climate & T. xxvii. 440 The top of the hill is composed of a compact porphyritic felstone.
attrib.1882J. Hardy in Proc. Berw. Nat. Club IX. 466 A very perfect felstone celt. |