Definition
Origin
Discoverer
Etymology
Class
Sub-Class
Group
Other Categories
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
From the English mud and stone, from low German mudde and stainaz
Fine Grained Rock, Opaque Rock
Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine
Ferdinand von Hochstetter
From the name of Dun Mountain, New Zealand, + -ite1
Durable Rock, Medium Hardness Rock
Coarse Grained Rock, Opaque Rock