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t-shirts map t-shirts 1991 t-shirts africa t-shirts american t-shirts antarctica t-shirts asia t-shirts atlantic ocean t-shirts australia t-shirts computer graphic t-shirts country t-shirts crust t-shirts digital t-shirts earth t-shirts earthquake t-shirts elevation t-shirts

photographs map photos 1991 photos africa photos american photos antarctica photos asia photos atlantic ocean photos australia photos computer graphic photos country photos crust photos digital photos earth photos earthquake photos elevation photos

EARTH: TOPOGRAPHY. Digital image of the topography of the Earth, showing land and sea-floor elevations, as well as crustal plate boundaries and the epicenters of earthquakes greater than magnitude 5 which occurred between 1980-1990. Image created by the National Geophysical Data Center, c1991.