Definition
Comendite is a hard, peralkaline igneous rock, a type of light blue grey rhyolite
Ignimbrite is a volcanic rock consisting mainly of pumice fragments, formed by the consolidation of material deposited by pyroclastic flows
History
Origin
Italy
New Zealand
Discoverer
Unknown
Patrick Marshall
Etymology
Comendite derives its name from the area of Le Commende on San Pietro Island in Italy
From Latin ignis fire + imber, imbr- shower of rain, storm cloud + -ite
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
Volcanic
Other Categories
Medium Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock