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
Diabase is a fine-grained igneous rock which is composed mostly of pyroxene and feldspar
History
Origin
New Zealand
Germany
Discoverer
Unknown
Christian Leopold von Buch
Etymology
From German which means hornstone
From Greek di + base
Class
Metamorphic Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Hard Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock