Natural environment

Natural environment

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

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Natural environment > Volcano

phreatic explosion

Natural environment; Volcano

An explosive volcanic eruption caused when water and heated volcanic rocks interact to produce a violent expulsion of steam and pulverized rocks. Magma is not involved.

phreatomagmatic

Natural environment; Volcano

An explosive volcanic eruption that results from the interaction of surface or subsurface water and magma.

pillow lava

Natural environment; Volcano

Interconnected, sack-like bodies of lava formed underwater.

pipe

Natural environment; Volcano

A vertical conduit through the Earth's crust below a volcano, through which magmatic materials have passed. Commonly filled with volcanic breccia and fragments of older rock.

pit crater

Natural environment; Volcano

A crater formed by sinking in of the surface, not primarily a vent for lava.

plastic

Natural environment; Volcano

Capable of being molded into any form, which is retained.

plate tectonics

Natural environment; Volcano

The theory that the earth's crust is broken into about 10 fragments (plates,) which move in relation to one another, shifting continents, forming new ocean crust, and stimulating ...