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A stratovolcano, also known as a composite volcano, is a typically conical volcano built up by many alternating layers of hardened lava and tephra. [1] Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and explosive eruptions. [2] Some have collapsed summit craters called calderas. [3]
The most active shield volcano in Africa is Nyamuragira. Eruptions at the shield volcano are generally centered within the large summit caldera or on the numerous fissures and cinder cones on the volcano's flanks. Lava flows from the most recent century extend down the flanks more than 30 km (19 mi) from the summit, reaching as far as Lake Kivu.
Unlike shield volcanoes, they are characterized by a steep profile and periodic, often alternating, explosive eruptions and effusive eruptions. Some have collapsed craters called calderas . The central core of a stratocone is commonly dominated by a central core of intrusive rocks that range from around 500 meters (1,600 ft) to over several ...
[8] [9] It is about 65 kilometres (40 miles) long and 20 kilometres (12 miles) wide, consisting of several stratovolcanoes, shield volcanoes, subglacial volcanoes, lava domes and cinder cones. [10] [11] [12] This volcanic complex includes a broad, steep-sided, intermontane plateau that rises from a base elevation of 760 or 816 metres (2,500 or ...
This page contains stratovolcanoes that have the characteristics of shield volcanoes Pages in category "Stratovolcanoes with shield volcano characteristics" The following 10 pages are in this category, out of 10 total.
Mount Hood is Oregon's most active volcano. Mount Jefferson; Castle Rocks [3] Black Butte; Mount Washington. It is debatably a stratovolcano. It is most confirmed to be a shield volcano. The Three Sisters; Middle Sister; South Sister; The Husband; The Wife; Broken Top; Mount Bachelor; Newberry Volcano. Also has the characteristics of a shield ...
A polygenetic volcanic field is a group of polygenetic volcanoes, each of which erupts repeatedly, in contrast with monogenetic volcanoes, each of which erupts only once. [1] Polygenetic volcanic fields generally occur where there is a high-level magma chamber .
Then, from 4.9 to 3.9 Ma, a third shield volcano (Anaga shield volcano) was active in the northeastern part of Tenerife; the remains of this volcano are the Anaga massif. [91] The lavas of these three shield volcanoes gradually formed a combined volcanic edifice that accounts for 90% of Tenerife's current volume. [92]