Definition
Granulite is fine to medium grained metamorphic rock with a granular of polygonal crystals.
Rapakivi Granite is a hornblende-biotite Granite containing large rounded crystals of orthoclase which are mantled with oligoclase
History
Origin
Central Europe
Finland, Europe
Discoverer
Unknown
Jakob Sederholm
Etymology
From Latin granulum, a little grain or fine grained
From Finnish Rapakivi which stands for crumbly rock
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
-
Plutonic
Other Categories
Coarse Grained Rock, Medium Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock