| 释义 |
microfelsite Geol. and Min.|maɪkrəʊˈfɛlsaɪt|
[f. micro- + felsite.]
A form of felsite incapable of resolution under the microscope. Hence microfelˈsitic a., of, belonging to, or consisting of, microfelsite.
1879Rutley Stud. Rocks x. 171 It yet remains to be shown whether micro-felsitic matter is inert upon polarised light. 1888Teall Brit. Petrogr. 439 Microfelsite, a term first introduced by Zirkel,..is now generally defined as a microscopic substance, forming the base of some porphyries, which is characterized by the possession of a granular, scaly, and fibrous structure without the power of exerting any definite action on polarized light. |