A surface separating layers of sedimentary rocks and deposits. A bedding plane marks termination of one deposit and beginning of another of different character, such as a surface separating a sandston [..]

A set of metamorphic mineral assemblages, repeatedly associated in space and time, such that there is a constant and therefore predictable relationship between mineral composition and chemical composi [..]

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Large area of extremely flat ocean floor lying near a continent and generally over 4 km in depth.

Now extinct, earliest group of fish with jaws, ranging from the Silurian to the Permian.

Organic-walled microfossils common throughout the Proterozoic

Any heritable characteristic of an organism that improves its ability to survive and reproduce in its environment. Also used to describe the process of genetic change within a population, as influence [..]

The diversification, over evolutionary time, of a species or group of species into several different species or subspecies that are typically adapted to different ecological niches (for example, Darwi [..]

Adenosine-5'-triphosphate (ATP) transports chemical energy within cells for metabolism. It is produced by photophosphorylation and cellular respiration and used by enzymes and structural proteins [..]

A jawless, heavily armored fish that appeared in the Devonian