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Earth Space and Science

the angular distance of a place east or west of the meridian.
the point of origin of an earthquake
the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
a supercontinent comprising all the continental crust of the earth.
a geologic fault in which the upper wall has slipped downward relative to the lower wall.
a line on a map joining points of equal height above or below sea level.
arise from the transformation of existing rock types.
the formation of new areas of oceanic crust, which occurs through the upwelling of magma at midocean ridges and its subsequent outward movement on either side.
a solid inorganic substance of natural occurrence.
fault in which the hanging wall has moved upward relative to the footwall.
the point on the earth's surface vertically above the focus of an earthquake.
a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates that move slowly over the underlying mantle.
a long, seismically active submarine ridge system situated in the middle of an ocean basin and marking the site of the upwelling of magma associated with seafloor spreading.
Rocks formed by the cooling and solidifying of molten materials.
a type of map characterized by large-scale detail and quantitative representation of relief, usually using contour lines.
rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface
the angular distance of a place north or south of the earth's equator.
a volcano with steep sides made of layers of lava and ash.
the relatively thin part of the earth's crust that underlies the ocean basins.
a gentle sheen or soft glow, especially that of a partly reflective surface.