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Volcano Of Roccamonfina
The Volcano of Roccamonfina is an extinct volcano in Roccamonfina, Campania, southern Italy. It was active from some 650,000 to 50,000 years ago. It comprises an isolated large cone of some perimeter between the Monti Aurunci, the plain and valley of the Garigliano, the Monte Massico and the Monti Trebulani. The central caldera has a diameter of nearly and the small commune (town) of Roccamonfina is located ''inside'' it. Volcanic activity is now replaced by minor seismic movements and by the presence of mineral waters. The mount is part of the Roccamonfina-Garigliano Mouth Regional Park, created in 1999. The Ciampate del Diavolo are a series of hominid footprints in solidified ash from an eruption of the volcano 345,000 years ago. Geology The volcano originated as a stratovolcano in the Garigliano rift valley, with a group of eruptive mouths spread in a area; later an effusive activity concentrated in the central area, forming a volcanic cone some 1,800 m-high, mostly f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Roccamonfina Volcano
Roccamonfina is a ''comune'' (municipality) in the Province of Caserta in the Italian region Campania, located about northwest of Naples and about northwest of Caserta. In the communal territory is the extinct volcano of Roccamonfina. The fossil human footprints called Ciampate del Diavolo have been found there. The town is surrounded by dense groves of sweet chestnut trees. History In the territory of the volcano are traces of Ausonian or Auruncan settlements, with remains of polygonal walls dating to the 6th-5th century BC. Findings of coins and inscriptions seems to confirm the presence of a settlement in the current town as early as the 3rd century BC, although it is mentioned only in the 10th century AD. In the Middle Ages and the modern era it was a fief of Neapolitan and Papal noble families, while under the Bourbon rulers it was a direct possession of the crown of the Two Sicilies. Main sights Roccamonfina's main attraction is the sanctuary of ''Maria Santissima d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caldera
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is gone. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large depression at the surface (from one to dozens of kilometers in diameter). Although sometimes described as a Volcanic crater, crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur each century, the formation of a caldera is a rare event, occurring only a few times per century. Only seven caldera-forming collapses are known to have occurred between 1911 and 2016. More recently, a caldera collapse occurred at Kīlauea, Hawaii in 2018. Etymology The term ''caldera'' comes from Spanish language, S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calderas Of Italy
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is gone. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large depression at the surface (from one to dozens of kilometers in diameter). Although sometimes described as a crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Compared to the thousands of volcanic eruptions that occur each century, the formation of a caldera is a rare event, occurring only a few times per century. Only seven caldera-forming collapses are known to have occurred between 1911 and 2016. More recently, a caldera collapse occurred at Kīlauea, Hawaii in 2018. Etymology The term ''caldera'' comes from Spanish ', and Latin ', meaning "coo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landforms Of Campania
A landform is a natural or anthropogenic land feature on the solid surface of the Earth or other planetary body. Landforms together make up a given terrain, and their arrangement in the landscape is known as topography. Landforms include hills, mountains, canyons, and valleys, as well as shoreline features such as bays, peninsulas, and seas, including submerged features such as mid-ocean ridges, volcanoes, and the great ocean basins. Physical characteristics Landforms are categorized by characteristic physical attributes such as elevation, slope, orientation, stratification, rock exposure and soil type. Gross physical features or landforms include intuitive elements such as berms, mounds, hills, ridges, cliffs, valleys, rivers, peninsulas, volcanoes, and numerous other structural and size-scaled (e.g. ponds vs. lakes, hills vs. mountains) elements including various kinds of inland and oceanic waterbodies and sub-surface features. Mountains, hills, plateaux, and plains are the fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanoes Of Italy
The volcanism of Italy is due chiefly to the presence, a short distance to the south, of the boundary between the Eurasian Plate and the African Plate. Italy is a volcanically active country, containing the only active volcanoes in mainland Europe (while volcanic islands are also present in Greece, in the volcanic arc of the southern Aegean). The lava erupted by Italy's volcanoes is thought to result from the subduction and melting of one plate below another. Three main clusters of volcanism exist: a line of volcanic centres running northwest along the central part of the Italian mainland (see: Campanian volcanic arc); a cluster northeast of Sicily in the Aeolian Islands; and a cluster southwest of Sicily around the island of Pantelleria, in the Mediterranean's Strait of Sicily. Sardinia has had a totally separate geological history from that of the rest of Italy, where several cycles of volcanic activity occurred, the last of which ended at the beginning of the Pleistocen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct Volcanoes
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suio
Suio is a ''frazione'' (rural borough) of Castelforte, a municipality in southern Latium, central Italy. Overview It is located on the northernmost slopes of the Monti Aurunci, near the Garigliano river, and is composed of two villages: Suio Paese (or Suio Alto), situated on a hill with a medieval castle, and Forma di Suio, at the feet of the castle, in a location where thermal baths exists. The latter were mentioned since ancient times by writers such as Pliny the Elder and Lucan (Suio was a center of the Aurunci before the Roman conquest), and were frequented until the late Roman imperial times. Bath tourism became again active after World War II. Part of the Battle of the Garigliano (1503) was fought nearby. Other sights include the 13th century church of Santa Maria in Pensulis, which was perhaps built over a Roman villa, and was originally owned by the Knights Hospitaller The Order of Knights of the Hospital of Saint John of Jerusalem ( la, Ordo Fratrum Hospitalis S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volturno
The Volturno (ancient Latin name Volturnus, from ''volvere'', to roll) is a river in south-central Italy. Geography It rises in the Abruzzese central Apennines of Samnium near Castel San Vincenzo (province of Isernia, Molise) and flows southeast as far as its junction with the Calore Irpino near Caiazzo and runs south as far as Venafro, and then turns southwest, past Capua, to enter the Tyrrhenian Sea in Castel Volturno, northwest of Naples. The river is long. After a course of some it receives, about east of Caiazzo, the Calore River. The united stream now flows west-southwest past Capua, where the Via Appia and Latina joined just to the north of the bridge over it, and so through the Campanian plain, with many windings, into the sea. The direct length of the lower course is about , so that the whole is slightly longer than that of the Liri-Garigliano, and its basin far larger. Its main tributaries are San Bartolomeo, Lete, Torano, Rivo Tella, Titerno, Calore Irpino an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Explosive Eruption
In volcanology, an explosive eruption is a volcanic eruption of the most violent type. A notable example is the 1980 eruption of Mount St. Helens. Such eruptions result when sufficient gas has dissolved under pressure within a viscous magma such that expelled lava violently froths into volcanic ash when pressure is suddenly lowered at the vent. Sometimes a lava plug will block the conduit to the summit, and when this occurs, eruptions are more violent. Explosive eruptions can expel as much as per second of rocks, dust, gas and pyroclastic material, averaged over the duration of eruption, that travels at several hundred meters per second as high as into the atmosphere. This cloud may subsequently collapse, creating a fast-moving pyroclastic flow of hot volcanic matter. Stages of an explosive eruption An explosive eruption begins with some form of blockage in the crater of a volcano that prevents the release of gases trapped in highly viscous andesitic or rhyolitic magma. The pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcanic Lake
A volcanogenic lake is a lake formed as a result of volcanic activity. They are generally a body of water inside an inactive volcanic crater (crater lakes) but can also be large volumes of molten lava within an active volcanic crater (lava lakes) and waterbodies constrained by lava flows, pyroclastic flows or lahars in valley systems. The term volcanic lake is also used to describe volcanogenic lakes, although it is more commonly assigned to those inside volcanic craters. Volcanic crater lakes Lakes in calderas fill large craters formed by the collapse of a volcano during an eruption. Examples: *Crater Lake, Oregon, United States *Heaven Lake, China/North Korea *Lake Toba, Sumatra, Indonesia Lakes in maars fill small craters where an eruption deposited debris around a vent. Examples: *Lake Nyos, Northwest Region, Cameroon *Lac Pavin, Puy-de-Dôme, France *Soda Lakes, Nevada, United States Lava lakes These are some examples of rare lava lakes where molten lava in a volcano m ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tephra
Tephra is fragmental material produced by a volcanic eruption regardless of composition, fragment size, or emplacement mechanism. Volcanologists also refer to airborne fragments as pyroclasts. Once clasts have fallen to the ground, they remain as tephra unless hot enough to fuse into pyroclastic rock or tuff. Tephrochronology is a geochronological technique that uses discrete layers of tephra—volcanic ash from a single eruption—to create a chronological framework in which paleoenvironmental or archaeological records can be placed. When a volcano explodes, it releases a variety of tephra including ash, cinders, and blocks. These layers settle on the land and, over time, sedimentation occurs incorporating these tephra layers into the geologic record. Often, when a volcano explodes, biological organisms are killed and their remains are buried within the tephra layer. These fossils are later dated by scientists to determine the age of the fossil and its place within the geolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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