Invitation to Geology; the Earth Through Time and Space, Volume 1 |
Common terms and phrases
activity amount ancient animals areas assumed astronomers basic basins become believed called cause changes clearly Consider continental continents core dating deposited drift early earth earth's crust earth's magnetic field earth's surface earthquakes elements energy evidence example explain fact feet field FIGURE floor forces formed fossils geologic geologic processes geologist heat hundred idea igneous important indicate interested interpretation invitation known land later lava layers learned lived logical magnetic mantle mass materials means ments miles million mineral mountains move movements natural objects observations ocean once organisms origin past physical planet possible present Press principles problems processes produced radioactive ranges recent recognized record relation relatively remains result ridge rocks scientific scientists sediments shape similar solar solid space suggested techniques theory thought thousand tion universe volcanic York