Mudstone is the fine grained sedimentary rock that were clays or muds originally.
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No, mudstone is a type of sedimentary rock formed from the compression and cementation of fine-grained mud and silt particles. Metamorphic rocks are formed from the alteration of pre-existing rocks due to high pressure, temperature, or chemical processes.
Mudstone: a crumbly sedimentary rock which is a step below shale in compactness.
Mudstone can be changed into a metamorphic rock through the process of metamorphism, where it is subjected to high temperature and pressure. This causes recrystallization of minerals, reorganization of grains, and the development of new mineral assemblages, transforming the mudstone into a new metamorphic rock such as slate, schist, or gneiss.
A metamorphic rock.
Slate. Slate is a low grade metamorphic rock derived from shale or mudstone.
Phyllite is metamorphosed slate, which is also a metamorphic rock. Shale or mudstone is the protolith (parent rock) of slate.
Phyllite is a type of metamorphic rock, not a mineral. It is formed from the metamorphism of shale or mudstone and has a fine-grained texture with a silky sheen due to the alignment of its minerals.