出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/04/09 11:14 UTC 版)
Jasperoid is a rare, peculiar type of metasomatic alteration and occurs in two main forms; sulfidic jasperoids and hematitic jasperoids. True jasperoids are different from jaspillite, which is a form of metamorphosed chemical sedimentary rock, and from jasper which is a chemical sediment.