felstonen.

/ˈfɛlstəʊn/

Etymology: < German felsstein, < fels rock + stein stone. By early German mineralogists used vaguely for amorphous rocks; association with felsite n. has given it a more restricted meaning.

Mineralogy.

(See quot. 1865.)

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > felsite

petrosilex1770

felsite1794

patrinite1811

felstone1858

1858 A. Geikie Story of Boulder xii. 240 Traps..consisting..of felspar, whence they are known as felstones.

1865 D. Page Handbk. Geol. Terms (ed. 2) 201 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.

1875 J. Croll Climate & Time xxvii. 440 The top of the hill is composed of a compact porphyritic felstone.

attributive.1882 J. Hardy in Hist. Berwickshire Naturalists' Club 9 466 A very perfect felstone celt.

This entry has not yet been fully updated (first published 1895; most recently modified version published online September 2018).

单词	felstone
释义	felstonen. /ˈfɛlstəʊn/ Etymology: < German felsstein, < fels rock + stein stone. By early German mineralogists used vaguely for amorphous rocks; association with felsite n. has given it a more restricted meaning. Mineralogy. (See quot. 1865.) ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > felsite petrosilex1770 felsite1794 patrinite1811 felstone1858 1858 A. Geikie Story of Boulder xii. 240 Traps..consisting..of felspar, whence they are known as felstones. 1865 D. Page Handbk. Geol. Terms (ed. 2) 201 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. 1875 J. Croll Climate & Time xxvii. 440 The top of the hill is composed of a compact porphyritic felstone. attributive.1882 J. Hardy in Hist. Berwickshire Naturalists' Club 9 466 A very perfect felstone celt. This entry has not yet been fully updated (first published 1895; most recently modified version published online September 2018). < n.1858
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