Definition
Hornfels is a metamorphic rock formed by the contact between mudstone or other clay rich rock, and a hot igneous body, and represents a heat altered equivalent of the original rock
Charnockite is a variety of granite containing minerals like orthopyroxene, quartz, and feldspar
History
Origin
New Zealand
Tamil Nadu, India
Discoverer
Unknown
T. H. Holland
Etymology
From German which means hornstone
From Job Charnock, an administtrator of East India Company
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
-
Plutonic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock