Definition
Jasperoid is a rare, peculiar type of metasomatic alteration of rocks
Trachyandesite is an extrusive igneous rock.
History
Origin
USA
Indonesia
Discoverer
Unknown
Unknown
Etymology
From silica, the main mineral content of Jasperoid
From French trachyandésite, trachy + andésite andesite, a lava intermediate in composition between trachyte and andesite
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Volcanic
Other Categories
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock