is an intrusive igneous rock composed principally of the silicate minerals plagioclase feldspar, biotite, hornblende, and/or pyroxene.
it is the uppermost layer of the oceanic portion of a tectonic plate.
an instrument that responds to ground motions, such as caused by earthquakes, volcanic eruptions, and explosions.
is the geological process in which sediments, soil and rocks are added to a landform or land mass.
is a naturally occurring material that is broken down by processes of weathering and erosion, and is subsequently transported by the action of wind, water, or ice or by the force of gravity acting on the particles.
is a mafic extrusive igneous rock formed from the rapid cooling of lava rich in magnesium and iron exposed at or very near the surface of a terrestrial planet or a moon.
a mechanical wave that propagates along with the interface between differing media.
are types of rock that are formed by the accumulation or deposition of small particles and subsequent cementation of mineral or organic particles on the floor of oceans or other bodies of water at the Earth's surface.
it is the highly viscous, mechanically weak, and ductile region of the upper mantle of Earth.
Is the solid, outer part of the Earth.
are solid substances that are present in nature and can be made of one element or more elements combined together (chemical compounds).
is a sedimentary rock composed of sand-size grains of mineral, rock, or organic material.
it is the outermost solid shell of a rocky planet, dwarf planet, or natural satellite.
is the very hot, very dense center of our planet. The ball-shaped core lies beneath the cool, brittle crust and the mostly-solid mantle.