Volcanoes and earthquakes

a fissure in the earth's crust (or in the surface of some other planet) through which molten lava and gases erupt

Any crude mixture of mineral or organic matters in the state of a thin paste.

The melted rock ejected by a volcano from its top or fissured sides. It flows out in streams sometimes miles in length. It also issues from fiss…

a bowl-shaped geological formation at the top of a volcano

(of volcanoes) pouring out fumes or lava (or a deposit so formed)

any of various deciduous pinnate-leaved ornamental or timber trees of the genus Fraxinus

(geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other; "they built it right over a geolog…

shaking and vibration at the surface of the earth resulting from underground movement along a fault plane or from volcanic activity

a small earthquake

Alt. of Seismal

(zoology) a protective layer of epidermis in mollusks or brachiopods that secretes a substance forming the shell

the outer layer of the Earth

a spring that discharges hot water and steam