Definition
Hawaiite is volcanic rock that resembles basalt. It is an olivine basalt with intermediate composition between alkali olivine and mugearite
Dacite is a volcanic igneous rock which is rintermediate in composition between andesite and rhyolite
History
Origin
Hawaii Islands
Romania and Moldova, Europe
Discoverer
Joseph Iddings
Unknown
Etymology
From Hawaii Islands
From Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains where the rock was first described
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Medium Hardness Rock
Durable Rock, Soft Rock
Family
Group
Volcanic
Volcanic
Other Categories
Opaque Rock
Fine Grained Rock, Medium Grained Rock, Opaque Rock