A term applied to a variety of minerals which occur as loose mixtures of clay, calcium carbonate, and carbon based materials in various stages of decomposition. It is frequently found in a hydrous state in subterraneous deposits. It is used for fertilizer and also in the beauty industry for its exfoliative properties
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Tag: <span>M</span>
A deposit of sedimentary material which has settled underwater
Rock derived from recrystallization of limestone, metamorphisized through heat and pressure
The layer within the Earth between the crust and the molten core
A brittle, grayish-white, metallic element. Symbol, Mn
The property of a mineral that can withstand bending, compression and deformation
An ore of copper, Cu2CO3(OH)2
Rocks which have been altered by heat and/or pressure
An instrument used to measure the magnetic attraction of minerals
The study of refining and alloying metals