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Geology Of Italy
The geology of Italy includes mountain ranges such as the Alps and the Apennines formed from the uplift of igneous and primarily marine sedimentary rocks all formed since the Paleozoic. Some active volcanoes are located in Insular Italy. Geologic history, stratigraphy, and tectonics Paleozoic (541-251 million years ago) The oldest rocks in Italy may include oceanic crust subducted during the Caledonian orogeny and 440 million year old Ordovician granites. Only detrital zircons in the Alps dates to the Precambrian. These granites are located offshore of Venice, found in the Agip Assunta well and deformed, transforming into orthogneiss during the Hercynian orogeny. Overall, Italian Paleozoic rocks commonly show evidence of the Hercynian orogeny in the Alps, Sardinia, the Apuan Alps of Tuscany, and the Peloritani mountains of Sicily and Calabria. The Hercynian orogeny produced a large thrust belt, thickened the crust and led to polyphaser metamorphism yielding rocks such as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peloritani
The Peloritani ( Sicilian: , ) are a mountain range of north-eastern Sicily, in southern Italy, extending for some from Capo Peloro to the Nebrodi Mountains. On the north and east they are bordered by the Tyrrhenian and Ionian Seas respectively, and on the south by the Alcantara River . The highest peaks are the Montagna Grande (), the Rocca di Novara (), the Pizzo di Vernà (), the Monte Poverello () and the Monte Scuderi (). The range is made up of a long series of peaks, with an average height of , intermingled with ridges and ravines. The deep gorges house numerous streams that create the typical rivers of this land called , often full of deprises in their inferior flow. The most common rocks are of igneous and metamorphic origin. Sandstone soils are also present. Of unusual origin are the megaliths rocks of the Argimusco plateau. Vegetation includes holm oak, oak, cork oak, beech, pine and chestnut, which once formed large forests but are now, mostly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gallura
Gallura ( or ; ) is a region in North-Eastern Sardinia, Italy. The name ''Gallùra'' is allegedly supposed to mean "stony area". Geography Gallùra has an area of . It is from the Italian peninsula and from the French island of Corsica. The coast of Gallura is very jagged and continues along in a continuous series of small fiords, rock-cliffs and little islands that form the archipelago of La Maddalena, a natural bridge towards nearby Corsica. The landscape is characterised by granite rocks and harsh mountains that, even if not particularly high, have constituted for millennia a barrier between this region and the nearby territories of Baronie and Montalbo. Monte Limbara is the highest mountain (1,362 m/4,469 ft). It represents the boundary between Gallura and the nearby region called Logudoro. Its highest peak is Punta Balestrieri (1362 m above the sea level). In the past, Monte Limbara used to be the location of an important NATO long range radar base and a Carabini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barbagia
Barbagia (; or ) is a geographical, cultural and natural region of inner Sardinia, contained for the most part in the province of Nuoro and Ogliastra and located alongside the Gennargentu massif. The name comes from Cicero, who described the land as inhabited by barbarians; Roman domination over this part of the island was in fact never more than nominal as a result of the Roman-Sardinian Wars. This word shares its etymology with the now antiquated ''Barbary''. The Sardinians, many of whose revolts came from this area, were also mocked by the ancient Romans with the pejorative term 'thieves wearing rough woolen garments'. In 594, Pope Gregory the Great wrote a letter to Hospito, a Christian whom he calls the "leader of the Barbaricini" (). Hospito apparently permitted the evangelisation of pagan Barbagia by Christian missionaries. The area is usually divided into five Barbagias: the Barbagia of Ollolai, the Barbagia of Seulo, the Barbagia of Belvì, the Mandrolisai, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cima D'Asta
Cima d’Asta at is the highest mountain of the Fiemme Mountains in the eastern part of the Italian province of Trentino. It is situated in Pieve Tesino, between the Vanoi valley to the north and the Tesino valley to the south and is 18 km north-east of the town of Borgo Valsugana. It is over 21 km away from the nearest higher summit, the Cimon della Pala. Just south of the summit is a mountain lake at 2460 m, the ''Lago di Cima d’Asta'', from which the river ''Grigno'' originates. It is unclear when the first ascent was made. On his ascent in 1882, Gustav Euringer did not find evidence of earlier visits, but was aware that the summit had been a triangulation point since 1816 and assumed it had been reached at or before that time.Gustav EuringerCima d'Asta gruppe und Vicentinische Alpen in ''Die Erschliessung der Ostalpen, Volume 3'', by the German and Austrian Alpin Club, Berlin, 1894 References {{Authority control Mountains of Trentino Fiemme Mountains Mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brixen
Brixen (; , ; or , ) is a town and communes of Italy, commune in South Tyrol, northern Italy, located about north of Bolzano. Geography Brixen is the third-largest city and oldest town in the province, with a population of nearly twenty-three thousand. It is located at the confluence of the Eisack and Rienz rivers, and today it is the capital of the Eisack district community. The Brenner Pass, on the Italian-Austrian border, is 45 km to the north of Brixen, and Bolzano lies 40 km to the south. To the east lies the Plose mountain massif with three peaks, the closest of which being the Telegraph peak (Monte Telegrafo) (2,486 m), formally known as Fröllspitze. On the western side, there is the Königsangerspitze mountain (Monte Pascolo) (2,439 m) and the Pfeffersberg slope (Monteponente), both of which are located within the Sarntal Alps. Brixen is especially known for its skiing, with a major skiing, ski resortthe Plose ''Frazioni'' Brixen is made up of about 22 small ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southern Alps
The Southern Alps (; officially Southern Alps / Kā Tiritiri o te Moana) are a mountain range extending along much of the length of New Zealand, New Zealand's South Island, reaching its greatest elevations near the range's western side. The name "Southern Alps" generally refers to the entire range, although separate names are given to many of the smaller ranges that form part of it. The range includes the South Island's Main Divide, which separates the drainage basin, water catchments of the more heavily populated eastern side of the island from those on the west coast. Politically, the Main Divide forms the boundary between the Marlborough Region, Marlborough, Canterbury Region, Canterbury and Otago regions of New Zealand, regions to the southeast and the Tasman Region, Tasman and West Coast, New Zealand, West Coast regions to the northwest. Names The Māori language, Māori name of the range is , meaning "the Fata Morgana (mirage), Mirage of the Ocean". The English people, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monte Rosa
Monte Rosa (; ; ; or ; ) is a mountain massif in the eastern part of the Pennine Alps, on the border between Italy (Piedmont and Aosta Valley) and Switzerland (Valais). The highest peak of the massif, amongst several peaks of over , is the Dufourspitze (), the second highest mountain in the Alps and western Europe, after Mont Blanc.John Ball (naturalist), John Ball, ''A Guide to the Western Alps'', pp. 308-314 The east face of the Monte Rosa towards Italy has a height of about and is the highest mountain wall of the Alps. The group is on the main chain of the Alps, watershed between the Rhône and Po (river), Po basins and has a topographic prominence of which is ranked fifth in the Alps. The Monte Rosa massif has four faces. Three are in Italy: the Liskamm heading above the Val de Gressoney; the Valsesian face above Alagna Valsesia at the upper part of the Valle della Sesia; and the steep, big east wall above Macugnaga in the Valle Anzasca. The Swiss north-western face ha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mont Blanc
Mont Blanc (, ) is a mountain in the Alps, rising above sea level, located right at the Franco-Italian border. It is the highest mountain in Europe outside the Caucasus Mountains, the second-most prominent mountain in Europe (after Mount Elbrus in Russia), and the 11th most prominent mountain in the world. The mountain gives its name to its range, the Mont Blanc massif, which straddles parts of France, Italy, and Switzerland. Mont Blanc's summit lies on the watershed line between the valleys of Ferret and Veny in Italy, and the valleys of Montjoie, and Arve in France. Ownership of the summit area has long been disputed between France and Italy. The Mont Blanc massif is popular for outdoor activities such as hiking, climbing, and trail running and winter sports such as skiing and snowboarding. The most popular climbing route to the summit of Mont Blanc is the Goûter Route, which typically takes two days. The three towns and their communes which surround Mont Bla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Andalusite
Andalusite is an aluminium nesosilicate mineral with the chemical formula Al2SiO5. This mineral was called andalousite by Delamétherie, who thought it came from Andalusia, Spain. It soon became clear that it was a locality error, and that the specimens studied were actually from El Cardoso de la Sierra, in the Spanish province of Guadalajara, not Andalusia. Andalusite is trimorphic with kyanite and sillimanite, being the lower pressure mid temperature polymorph. At higher temperatures and pressures, andalusite may convert to sillimanite. Thus, as with its other polymorphs, andalusite is an aluminosilicate index mineral, providing clues to depth and pressures involved in producing the host rock. Varieties The variety chiastolite commonly contains dark inclusions of carbon or clay which form a cruciform pattern when shown in cross-section. This stone was known at least from the sixteenth century, being taken to many European countries, as a souvenir, by pilgrims returning fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kyanite
Kyanite is a typically blue aluminosilicate mineral, found in aluminium-rich metamorphic pegmatites and sedimentary rock. It is the high pressure Polymorphism (materials science), polymorph of andalusite and sillimanite, and the presence of kyanite in metamorphic rocks generally indicates metamorphism deep in the Earth's crust. Kyanite is also known as disthene or cyanite. Kyanite is strongly anisotropy, anisotropic, in that its Mohs scale of mineral hardness, hardness varies depending on its crystallographic direction. In kyanite, this anisotropism can be considered an identifying characteristic, along with its characteristic blue color. Its name comes from the same origin as that of the color cyan, being derived from the Ancient Greek word κύανος. This is typically rendered into English as ''kyanos'' or ''kuanos'' and means "dark blue." Kyanite is used as a raw material in the manufacture of ceramics and abrasives, and it is an important index mineral used by geologists t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Metamorphic Facies
A metamorphic facies is a set of mineral assemblages in metamorphic rocks formed under similar pressures and temperatures.Essentials of Geology, 3rd Edition, Stephen Marshak The assemblage is typical of what is formed in conditions corresponding to an area on the two dimensional graph of temperature vs. pressure (See diagram in Figure 1). Rocks which contain certain minerals can therefore be linked to certain tectonic settings, times and places in the geological history of the area. The boundaries between facies (and corresponding areas on the temperature v. pressure graph) are wide because they are gradational and approximate. The area on the graph corresponding to rock formation at the lowest values of temperature and pressure is the range of formation of sedimentary rocks, as opposed to metamorphic rocks, in a process called diagenesis. Historic definition The name ''facies'' was first used for specific sedimentary environments in sedimentary rocks by Swiss geologist Amanz Gre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
