Definition
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
Claystone is a fine-grained, dark gray to pink sedimentary rock which mainly consists of compacted and hardened clay
History
Origin
Hawaii Islands
-
Discoverer
Unknown
Unknown
Etymology
From Greek pikros bitter + -ite, 19th century
From English clay and stone as the rock contains more amount of clay
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
Volcanic
-
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock