Volcanic Activity Permian Period Volcanic Eruptions Earth's Formation Mesozoic Era Ordovician Period Continental Drift Triassic Period Paleozoic Era Pleistocene Epoch Supercontinents Ice Age Ice Ages Mass Extinctions Paleogeography Cretaceous Period Cryogenian Period Ancient Rivers Supercontinent Gondwana Paleoenvironment Landmark Evolution Ancient Earth Pangaea Triassic-Jurassic Transition Erosion Icelandic Eruptions Seismic Events Geological Time Scale Lunar History Santorini Volcano Earth's Atmosphere Antarctic Glaciation Neoproterozoic Era Cambrian Period Ancient Rocks Earth's Geological Timeline Formation of Earth Yellowstone Caldera Hydrothermal Activity Paleontology Paleoclimatology Dinosaur Evolution Earth's Climate History Glacier Retreat Miocene Epoch Impact Events Earth's Geological Record Earth's History Phanerozoic Eon Granite Formations Himalayan Formation