Definition
Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock
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
History
Origin
Iceland
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Discoverer
Ian S. E. Carmichael
Christian Leopold von Buch
Etymology
From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland
From German Troklotit, from Greek trōktēs, a marine fish (taken to be trout)
Class
Igneous Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Volcanic
Plutonic
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock