accretion hypothesis

accretion hypothesis

[ə′krē·shən hī′päth·ə·səs]
(astronomy)
Any hypothesis which assumes that the earth originated by the gradual addition of solid bodies, such as meteorites, that were formerly revolving about the sun but were drawn by gravitation to the earth.
References in periodicals archive ?
Barbara Romanowicz, director of the University of California, Berkeley Seismological Laboratory, says the patterns she sees in the North American craton also support the arc accretion hypothesis. In Nature in August, Romanowicz and Berkeley postdoc Huaiyu Yuan analyzed seismic shear waves coursing through a North American craton from 94 earthquakes around the world.