Definition
Picrite is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine
Very fine grained fault rock which is composed of glassy matrix that often contains inclusions of wall-rock fragments.
History
Origin
Hawaii Islands
USA
Discoverer
Unknown
Unknown
Etymology
From Greek pikros bitter + -ite, 19th century
From pseudo- + tachylite, a glassy rock generated by frictional heat within faults.
Class
Igneous Rocks
Metamorphic Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
-
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock