A mineral containing phosphorous
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Tag: <span>P</span>
A term for igneous rocks having a texture of grainy crystal visible to the naked eye
The sum of homogenous material within a larger heterogeneous material body
The period 280 to 245 million years ago, followed by the Mesozoic era. Known as the age of amphibians
The replacement of minerals in organic matter by calcareous, carbonaceous or siliceous minerals, which serve to solidify and preserve the form of the matter beyond its organic state
A clay substance, such as kaolinite, suitable for use in the manufacture of porcelain
To progressively taper out
A compound comprised of two or more bonded molecules of the same simple substance
Lava that cools and solidifies in the sea
A last stage of settling for industrial effluent prior to release in the natural environment