Hallasan

Hallasan is a shield volcano on Jeju Island and South Korea’s highest mountain, rising 1,947 meters above sea level. Its volcanic slopes surround the summit crater lake Baengnokdam.

Shield volcano: A broad volcano built chiefly from successive flows of fluid basaltic lava. Hallasan’s broad profile reflects the low-viscosity lava that built a shield volcano.
Hawaiian eruption: An effusive volcanic eruption characterized by fluid lava fountains and flows. Effusive basaltic activity helps explain the broad volcanic form associated with Hallasan.
Oreum: A small volcanic cone on Jeju Island, commonly formed by an eruption from a secondary vent. Hundreds of these cones record scattered volcanic activity around Hallasan.
Hallasan National Park: A national park protecting Hallasan and surrounding highland ecosystems on Jeju Island. The park safeguards the mountain’s habitats and manages access to its trails.
Jeju Island: A volcanic island in the Korea Strait, belonging to South Korea. Hallasan forms Jeju Island’s central highland and dominates its terrain.
Lava flow: Molten rock that erupts onto the surface and moves downslope before solidifying. Successive lava flows built the shield-shaped body of Hallasan.
Geomunoreum Lava Tube System: A network of lava tubes in Jeju’s eastern volcanic region, recognized as a UNESCO World Heritage site. Its caves preserve lava pathways from eruptions in Hallasan’s volcanic province.
UNESCO Biosphere Reserve: A designated area that links biodiversity conservation with sustainable development and research. Jeju’s biosphere-reserve status includes Hallasan’s ecosystems and surrounding communities.
Baengnokdam: A crater lake occupying Hallasan’s summit crater. This lake marks the summit depression at Hallasan’s highest point.
Volcanic vent: An opening through which magma and volcanic gases reach Earth’s surface. Vents supplied the eruptions that formed Hallasan and Jeju’s volcanic features.

Linked from 3 pages