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Mesozoic era

(Encyclopedia) Mesozoic era mĕz˝əzō´ĭk [key] [Gr.,=middle life], major division of geologic time (see Geologic Timescale , table) from 65 to 225 million years ago. Great crustal disturbances that...

Shield Volcanoes

Shield volcanoes are built almost entirely of fluid lava flows. Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, ge…