Definition
Icelandite belongs to volcanic igneous rocks which is rich in iron and belongs to andesite rock
Mudstone is a fine-grained, dark gray sedimentary rock, which is formed from silt and clay and is similar to shale but has less laminations
History
Origin
Iceland
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Discoverer
Ian S. E. Carmichael
William Smith
Etymology
From its origin place near Cenozoic volcano near the parsonage Þingmúli in East Iceland
From the English mud and stone, from low German mudde and stainaz
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Soft Rock
Family
Group
Volcanic
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Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock