DEFINITION OF EPEIROGENY

Vertical motions of the crust and lithosphere,

with particular reference to the cratons. Most cratons have

been remarkably stable for billions of years since they

formed, apparently recording only vertical motions in contrast

to mountain or orogenic belts that record large-scale

horizontal motions. G. K. Gilbert introduced the term in

1890 to describe and attempt to explain large-scale features

of the Earth such as basins and plateaus. Gilbert suggested

that epeirogenic movements have created much of the recent

topography of cratons and younger eroded orogenic belts,

although most of these features and effects are now explained

by the plate tectonics paradigm.

epicenter See EARTHQUAKES.

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