1 Definition
1.1 Definition
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
Dunite is a green to brownish coarse-grained igneous rock mainly consisting of olivine
1.2 History
1.2.1 Origin
1.2.2 Discoverer
Unknown
Ferdinand von Hochstetter
1.3 Etymology
From the English mud and stone, from low German mudde and stainaz
From the name of Dun Mountain, New Zealand, + -ite1
1.4 Class
Sedimentary Rocks
Igneous Rocks
1.4.1 Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
1.5 Family
1.5.1 Group
1.6 Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock