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This Concept Map, created with IHMC CmapTools, has information related to: Tectonic Venus, Plate Tectonics On Venus Currently No Sign of Tectonics, Lithosphere Thickening Proved by Volcanic Rises, Volcanic Rises Caused by Magma Cannot "Punch" Through Thick Lithosphere, Much Older We know by Dating By the Amount of Impact Craters, No Sign of Tectonics Due to Lack of Water, Lithosphere Thickening Which Occured during a 100-200 million yrs period, Thick Lithosphere After Lithosphere Thickening, Lithosphere Thickening Proved by Volcanic Plateaus, Thick Lithosphere That Resists Convection Cureents in the Mantle, Lack of Water Which Would on Earth Lubricates Plate Motion, No Sign of Tectonics Due to Thick Lithosphere, No rock on Venus is thought to be older than 1 billion yrs Which meant Drastic Suface Change 1 billion - 600 million yrs Ago, Volcanic Plateaus Are Much Older, Possible Plate Tectonics Since No rock on Venus is thought to be older than 1 billion yrs, Much Younger We know by Dating By the Amount of Impact Craters, Thick Lithosphere Causes Volcanic Rises, No Sign of Tectonics Shown in No Ridges, Rifts, Linear Mts, oe Subduction Zones, Volcanic Plateaus Caused by Magma of a hot-spot breaking through, Volcanic Rises Are Much Younger, Plate Tectonics On Venus In the Past Possible Plate Tectonics