Definition
Harzburgite is a plutonic rock of the peridotite group consisting largely of orthopyroxene and olivine
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption
History
Origin
Germany
Italy
Discoverer
Unknown
Unknown
Etymology
From the name of a town in Harzburg, Germany
From a Latin word tophous then in Italian tufo and finally tuff
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Medium Hardness Rock
Family
Group
Plutonic
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock