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  2. Types of volcanic eruptions - Wikipedia

    en.wikipedia.org/wiki/Types_of_volcanic_eruptions

    Types of volcanic eruptions. Some of the eruptive structures formed during volcanic activity (counterclockwise): a Plinian eruption column, Hawaiian pahoehoe flows, and a lava arc from a Strombolian eruption. Several types of volcanic eruptions —during which material is expelled from a volcanic vent or fissure —have been distinguished by ...

  3. Timeline of volcanism on Earth - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_volcanism_on_Earth

    Paraná and Etendeka traps, Brazil, Namibia and Angola form 128 to 138 million years ago. 132 million years ago, a possible supervolcanic eruption occurred, ejecting 8,600 cubic kilometers (2,063 cu mi). [90] Formation of the Karoo-Ferrar flood basalts begins 183 million years ago.

  4. Volcanism - Wikipedia

    en.wikipedia.org/wiki/Volcanism

    Volcanism. Volcanism, vulcanism, volcanicity, or volcanic activity is the phenomenon where solids, liquids, gases, and their mixtures erupt to the surface of a solid-surface astronomical body such as a planet or a moon. [1] It is caused by the presence of a heat source, usually internally generated, inside the body; the heat is generated by ...

  5. Plinian eruption - Wikipedia

    en.wikipedia.org/wiki/Plinian_eruption

    Plinian eruption. Plinian eruption: 1: ash plume; 2: magma conduit; 3: volcanic ash fall; 4: layers of lava and ash; 5: stratum; 6: magma chamber. 1822 artist's impression of the eruption of Mount Vesuvius in 79, depicting what the AD 79 eruption may have looked like, by the English geologist George Julius Poulett Scrope.

  6. Mount Apo - Wikipedia

    en.wikipedia.org/wiki/Mount_Apo

    Mount Apo, also known locally as Apo Sandawa, is a large solfataric, dormant stratovolcano on the island of Mindanao, Philippines. With an elevation of 2,954 meters (9,692 ft) above sea level, it is the highest-mountain in the Philippine Archipelago, Mindanao and 24th-highest peak of an island on Earth. Located on the tripartite border of Davao ...

  7. Volcanic rock - Wikipedia

    en.wikipedia.org/wiki/Volcanic_rock

    Volcanic rock. Volcanic rocks (often shortened to volcanics in scientific contexts) are rocks formed from lava erupted from a volcano. Like all rock types, the concept of volcanic rock is artificial, and in nature volcanic rocks grade into hypabyssal and metamorphic rocks and constitute an important element of some sediments and sedimentary rocks.

  8. Category:Volcanoes - Wikipedia

    en.wikipedia.org/wiki/Category:Volcanoes

    Wikimedia Commons has media related to Volcanoes. Volcanoes are usually mountains (sometimes islands, lakes, plateaus, calderas, seamounts or lava domes) that are formed when magma (liquid rock) wells up from inside the Earth. There are also analogous formations away from the Earth. Many volcanoes are categorized both as volcanoes and other ...

  9. Volcanology - Wikipedia

    en.wikipedia.org/wiki/Volcanology

    The dashed trajectories are the result of lava pieces with a bright hot side and a cool dark side rotating in mid-air. Volcanology (also spelled vulcanology) is the study of volcanoes, lava, magma and related geological, geophysical and geochemical phenomena (volcanism). The term volcanology is derived from the Latin word vulcan.

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