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Monte Halla

Halla

Vulcano a scudo · South Korea · 1919 m

The massive Halla shield volcano, seen here from the south, forms much of the 40 x 80 km Cheju Island, which lies 90 km S of the Korean Peninsula. More than 360 late-Pleistocene and Holocene basaltic cones on the flanks of the low-angle volcano were erupted primarily along the long axis of the NE-SW-trending island. Most of these are scoria cones, but about 10 along the coast are Pleistocene tuff rings and tuff cones. Flank eruptions continued into historical time, with the final two taking place during the 11th century.
The massive Halla shield volcano, seen here from the south, forms much of the 40 x 80 km Cheju Island, which lies 90 km S of the Korean Peninsula. More than 360 late-Pleistocene and Holocene basaltic cones on the flanks of the low-angle volcano were erupted primarily along the long axis of the NE-SW-trending island. Most of these are scoria cones, but about 10 along the coast are Pleistocene tuff rings and tuff cones. Flank eruptions continued into historical time, with the final two taking place during the 11th century. · Foto: Photo by Norm Banks, 1980 (U.S. Geological Survey). · Wikimedia Commons
Tipo
Vulcano a scudo
Paese
South Korea
Regione
Eastern Asia Volcanic Regions / Central East Asia Volcanic Province
Altitudine
1919 m
Coordinate
33.361, 126.530
Ultima eruzione
1007
Contesto tettonico
Intraplate / Continental crust (> 25 km)
Forma vulcanica
Shield
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

The massive Halla shield volcano forms much of the 40 x 80 km Cheju (Jeju) Island, which lies 90 km S of the Korean Peninsula. Eruptions during the Pliocene and Pleistocene built a lava plateau above the roughly 100-m-deep continental shelf on which the basaltic-to-trachytic edifice was constructed. A 400-m-wide crater truncates the summit. About 360 late-Pleistocene and Holocene basaltic cones across the flanks were erupted primarily along the long axis of the ENE-WSW-trending island. Most of these are scoria cones, but about 20 along the coast or offshore are Pleistocene-to-Holocene tuff rings and tuff cones; lava domes also occur. The latest two eruptions took place during the 11th century.

Sintesi da Wikipedia

Riassunto in inglese

Hallasan (Korean: 한라산) is a shield volcano comprising much of Jeju Island in South Korea. Its summit, at 1,947 m (6,388 ft), is the highest point in the country. The area around the mountain is a designated national park, named Hallasan National Park. Hallasan is commonly considered to be one of the three main mountains of South Korea, along with Jirisan and Seoraksan.

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Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
2830 BCE~2638 BCE · 1 eruzioni · VEI max. ?2063 BCE~1871 BCE · 1 eruzioni · VEI max. ?815~1007 · 2 eruzioni · VEI max. ?2830 BCE1871 BCE911 BCE144 BCE815

Cronologia dettagliata

  1. 1007VEI ?Osservata
    1007 – In corso
  2. 1002VEI ?Osservata
    1002 – In corso
  3. 2050 a.C. (±200 anni)VEI ?Stima geologica
    BCE 2050 – In corso
    SW flank (Songaksan tuff ring)
  4. 2830 a.C. (±50 anni)VEI ?Stima geologica
    BCE 2830 – In corso
    NE flank (Ilchulbong tuff cone)

Link esterni

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