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Level Mountain

Gunung api perisai · Canada · 2164 m

Meszah Peak of the Level Mountain volcanic complex is viewed from the east. The dark unit in the center foreground is alkali basalt. Trachytic lava flows and agglomerates form a series of benches at the base of Meszah Peak. The cliffs are composed of welded tuffs capped by thin basaltic lava flows. Level Mountain volcano is the most voluminous and most persistent eruptive center of the Stikine volcanic belt in NW British Columbia, covering an area of 1,800 km2 north of Telegraph Creek.
Meszah Peak of the Level Mountain volcanic complex is viewed from the east. The dark unit in the center foreground is alkali basalt. Trachytic lava flows and agglomerates form a series of benches at the base of Meszah Peak. The cliffs are composed of welded tuffs capped by thin basaltic lava flows. Level Mountain volcano is the most voluminous and most persistent eruptive center of the Stikine volcanic belt in NW British Columbia, covering an area of 1,800 km2 north of Telegraph Creek. · Foto: Photo by Geological Survey of Canada (courtesy of Cathie Hickson). · Wikimedia Commons
Tipe
Gunung api perisai
Negara
Canada
Wilayah
North America Volcanic Regions / Northern Cordilleran Volcanic Province
Ketinggian
2164 m
Koordinat
58.420, -131.350
Letusan terakhir
Tidak diketahui
Kondisi tektonik
Intraplate / Continental crust (> 25 km)
Bentuk lahan
Shield
Batuan utama
Trachyte / Trachydacite
Ringkasan geologi

Level Mountain is the most voluminous eruptive center of the Stikine volcanic belt in NW British Columbia. The massive volcano covers an area of 1,800 km2 SW of Dease Lake and N of Telegraph Creek. An 860 km3 bimodal Miocene-to-Pliocene stratovolcano with several eruptive centers caps a Miocene basaltic shield. Following extensive glacial dissection and emplacement of late-Pliocene silicic lava domes, lesser activity continued into the Quaternary. More than 20 Tertiary-to-Holocene eruptive centers have been identified in the central portion of Level Mountain and on its flanks. The broad dissected summit region consists of trachytic and rhyolitic lava domes and was considered to have several minor basaltic vents of postglacial age (Hamilton and Scafe, 1977), although Edwards and Russell (2000) considered Holocene activity to be uncertain.

Ringkasan Wikipedia

Ringkasan Inggris

Level Mountain is a large volcanic complex in the Northern Interior of British Columbia, Canada. It is located 50 kilometres north-northwest of Telegraph Creek and 60 km (37 mi) west of Dease Lake on the Nahlin Plateau. With a maximum elevation of 2,164 metres, it is the second-highest of four large complexes in an extensive north–south trending volcanic region. Much of the mountain is gently sloping; when measured from its base, Level Mountain is about 1,100 m (3,600 ft) tall, slightly taller than its neighbour to the northwest, Heart Peaks. The lower, broader half of Level Mountain consists of a shield-like structure whereas its upper half has a more steep, jagged profile. Its broad summit is dominated by the Level Mountain Range, a small mountain range with prominent peaks cut by deep valleys. These valleys serve as a radial drainage for several small streams that flow from the mountain. Meszah Peak is the only named peak in the Level Mountain Range.

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