Definition
Origin
Discoverer
Etymology
Class
Sub-Class
Group
Other Categories
Pantellerite is a peralkaline rhyolite. It has a higher iron and lower aluminium composition than comendite
From Pantelleria, a volcanic island in the Strait of Sicily
Fine Grained Rock, Opaque Rock
Chalk is a soft, white, powdery limestone consisting mainly of fossil shells of foraminifers
From old English cealc chalk, lime, plaster; pebble, from Greek khalix small pebble, in English transferred to the opaque, white, soft limestone
Fine Grained Rock, Opaque Rock