Download
1 / 3
30 likes | 113 Views
Explore the fascinating world of volcanoes, from their formation at Earth's surface openings to different types like shield and cinder cone. Discover features such as craters, calderas, geysers, and volcanic ash. Learn about their gentle lava flows and explosive eruptions, creating stunning landscapes and shaping our planet. Unravel the science behind these natural wonders and witness the raw beauty and power of volcanic activity.
E N D
Volcanoes Formation • An opening in the Earth’s surface through which magma rises • Most observed volcanoes occur at colliding boundaries. • One lighter plate (oceanic plate) sinks below a heavier one (continental plate) • Other volcanoes occur at spreading boundaries on the ocean floor • Gentler eruptions - lava quietly flows onto the surface of the plate • New ocean floor is created
Types • Shield • formed from lava flows that harden • Cinder Cone • formed from explosive eruptions in which volcanic materials are thrown high in the air and pile up around the vent of the volcano. • Composite - formed from alternating explosions and lava flow
Features • Crater • Deep sided depression at the top on the side of a volcano • Formed during an eruption • Magma • Molten rock inside the Earth • Lava • Molten rock which reaches the Earth’s surface • Caldera • Crater, at least 1.6 KM (.99 mile) wide • Crater Lake in Cascade Mountains • Geysers • Groundwater heated to its boiling point by trapped magma and erupts onto the surface • Old Faithful • Volcanic Ash • Tiny bits of rock thrown into the air during an eruption • Can form thick clouds of ash and cinders
