Geology 25-31
7 entries in the Geology compendium.
GraniteA tough, massive rock used in construction throughout history.GravelLoose rock fragments used widely in construction and concrete.GypsumA soft sulfate mineral used in plaster, fertilizer, and sculpture.Hotspot (geology)Volcanic hotspots are mantle-fed locales independent of plate boundaries.Ice ageA period of cooling with expanded glaciers and ice caps.Ice sheetMassive glacial ice covering land, driving sea level and climate.Ice shelfFloating glacial ice platforms that moderate glacier flow.
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