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| | USGS CMG InfoBank Geology School: continent |
 | | crust, "continental crust", "oceanic crust", granite, basalt, ocean, continent |
 | | continent, crust, mantle, subduction, andesite, diorite, "convergent plate", melting, upwelling, basalt, "lava flow", crust, felsic, viscosity, volcano, pluton, "David Sigurdson" |
 | | continent, "ice sheet", glacier, "glacial ice", "glacial melt", "glacial flow", moraine, till, drumlin, lake, basin, kettle, esker, civilization, silt, loess, "fertile soil", deposition |
| walrus.wr.usgs.gov /infobank/programs/html/school/keypage/continent.html (1144 words) |
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