1 Definition
1.1 Definition
Troctolite is a mafic intrusive rock type. It consists essentially of major but variable amounts of olivine and calcic plagioclase along with minor pyroxene. It is an olivine-rich anorthosite, or a pyroxene-depleted relative of gabbro
Kimberlite is a rare, blue-tinged, coarse-grained intrusive igneous rock, which sometimes contains diamonds and is mostly found in South Africa and Siberia.
1.3 History
1.3.1 Origin
Unknown
Kimberley, South Africa
1.3.2 Discoverer
Christian Leopold von Buch
Unknown
1.4 Etymology
From German Troklotit, from Greek trōktēs, a marine fish (taken to be trout)
From Kimberley + -ite, from the name of the South African town of Kimberley where the rock was first found.
1.5 Class
Igneous Rocks
Igneous Rocks
1.5.1 Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
1.6 Family
1.6.1 Group
1.7 Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Opaque Rock