Definition
Breccia is a rock consisting of angular fragments of stones which are cemented by finer calcareous material
Adakite is an intermediate to felsic volcanic rock that has geochemical characteristics of magma which is said to be formed by partial melting of altered basalt that is subducted below volcanic arcs
History
Origin
England
Adak, Aleutian Islands
Discoverer
Unknown
Defant and Drummond
Etymology
From Italian, literally gravel, Germanic origin and related to break
From Adak, Aleutian Islands
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Volcanic
Other Categories
Coarse Grained Rock, Medium Grained Rock, Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock