This leading dictionary ‎- now in its third edition ‎- offers wide‎-ranging and authoritative coverage of the earth sciences and related topics in 6‎,‎250+ clear and accessible entries‎.‎ Coverage includes geology‎,‎ oceanography‎,‎ paleontology‎,‎ minerology‎,‎ volcanology‎,‎ and planetary science as well as climatology‎,‎ geochemistry‎,‎ and petrology‎.‎ It is an essential reference for students of geography‎,‎ geology‎,‎ and earth sciences and in related disciplines‎.‎ The third edition is fully updated and includes additional coverage of process geomorphology and physical geography‎,‎ plus more than 50 new line drawings to accompany descriptions of forms and processes‎.‎ A new feature is an appendix of recommended web links updated on the Dictionary of Earth Sciences companion website‎.‎ Additional appendices include a revised geological time scale‎,‎ an updated bibliography‎,‎ stratigraphic units‎,‎ lunar and Martian time scales‎,‎ wind‎-strength scales‎,‎ and SI units‎.‎