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The mountain has attracted the attention of poets, [11] authors, [12] and presidents. [13] The mountain consists of four overlapping dormant volcanic cones that have built a complex shape, including the main summit and the prominent and visibly conical satellite cone of 12,330 ft (3,760 m) Shastina.
Mount Everest, Earth's highest mountain. A mountain is an elevated portion of the Earth's crust, generally with steep sides that show significant exposed bedrock.Although definitions vary, a mountain may differ from a plateau in having a limited summit area, and is usually higher than a hill, typically rising at least 300 metres (980 ft) above the surrounding land.
World map with the middle latitudes highlighted in red Extratropical cyclone formation areas. The middle latitudes, also called the mid-latitudes (sometimes spelled midlatitudes) or moderate latitudes, are spatial regions on either hemisphere of Earth, located between the Tropic of Cancer (latitude 23°26′09.7″) and the Arctic Circle (66°33′50.3″) in the northern hemisphere and ...
The erupted volcanic material (lava and tephra) that is deposited around the vent is known as a volcanic edifice, typically a volcanic cone or mountain. [2] [22] The most common perception of a volcano is of a conical mountain, spewing lava and poisonous gases from a crater at its summit; however, this describes just one of the many types of ...
The mountain's caldera was formed by an eruption in 946 that released about 100–120 km 3 (24–29 cu mi) of tephra. The eruption was among the largest and most powerful eruptions on Earth in the last 5,000 years. The volcano last erupted in 1903, and is expected to erupt around every hundred years.
Lassen Volcanic National Park, which encompasses an area of 106,372 acres (430.47 km 2), was created to preserve the areas affected by the eruption for future observation and study, to protect the nearby volcanic features, and to keep anyone from settling too close to the mountain.
The most recent volcanic activity was the production of a lava dome in the crater and its collapse down the side of the mountain in the 1850s or 1860s. [ 26 ] [ 27 ] Between 1755 and 1800, an eruption sent a pyroclastic flow down the mountain's northeast flanks, [ 28 ] and a moderate ash eruption occurred about 1755, of the size of Ruapehu 's ...
Mount Warning (Bundjalung: Wollumbin [1]), a mountain in the Tweed Range in the Northern Rivers region of New South Wales, Australia, was formed from a volcanic plug of the now-gone Tweed Volcano. The mountain is located 14 kilometres (9 mi) west-south-west of Murwillumbah, near the border between New South Wales and Queensland.