Qu'est-ce qu'une myrmékite?

Answer 1

MYRMEKITE :
Mixture de Quartz et de feldspath.

Myrmékite - n. f. - Feldspath contenant de fins vermicules de quartz disposés le plus souvent on forme buissonnante.

et en anglais:

Myrmekite
Optical Description:
Myrmekite is a "wormy" intergrowth of quartz in sodic plagioclase. In the photo above, quartz is the light gray "worms" in a plagioclase grain that is extinct. Other minerals present are plagioclase (upper right) , biotite (upper left), and quartz (extinct grain in lower left corner.

Occurrence:
Myrmekite occurs in quartz-rich intrusive rocks.


Merci j'ai appris quelque chose.