Definition
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Discoverer
Etymology
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Other Categories
Shonkinite is a rare, dark-coloured and intrusive igneous rock which contains augite and orthoclase feldspar as its primary constituents
From the name of Shonkin Sag ranges in the Highwood Mountains of north-central Montana, US
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock
A carbonate rock which is matrix supported and contains over 10% allochems in a carbonate mud matrix.
From the English mud and stone, from low German mudde and stainaz
Fine Grained Rock, Opaque Rock