Natural environment

Natural environment

Related to any physical feature of the earth's natural environment.

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Natural environment > Volcano

unconformity

Natural environment; Volcano

A substantial break or gap in the geologic record where a rock unit is overlain by another that is not next in stratigraphic sucession, such as an interruption in continuity of a ...

seismograph

Natural environment; Volcano

An instrument that records seismic waves; that is, vibrations of the earth.

shoshonite

Natural environment; Volcano

A trachyandesite composed of olivine and augite phenocrysts in a groundmass of labradorite with alkali feldspar rims, olivine, augite, a small amount of leucite, and some ...

volcanic arc

Natural environment; Volcano

A generally curved linear belt of volcanoes above a subduction zone, and the volcanic and plutonic rocks formed there.

sill

Natural environment; Volcano

A tabular body of intrusive igneous rock, parallel to the layering of the rocks into which it intrudes.

solfatara

Natural environment; Volcano

A type of fumarole, the gases of which are characteristically sulfurous.

surge

Natural environment; Volcano

A ring-shaped cloud of gas and suspended solid debris that moves radially outward at high velocity as a density flow from the base of a vertical eruption column accompanying a ...