Highest Mountains in Italy

Geology

Mont Blanc and adjacent mountains in the massif are predominantly formed from a large intrusion of granite (termed a batholith) which was forced up through a basement layer of gneiss and mica schists during the Variscan mountain-forming event of the late Palaeozoic period. The summit of Mont Blanc is located at the point of contact of these two rock types. To the southwest, the granite contact is of a more intrusive nature, whereas to the northeast it changes to being more tectonic. The granites are mostly very-coarse grained, ranging in type from microgranites to porphyroid granites.

The massif is tilted in a north-westerly direction and was cut by near-vertical recurrent faults lying in a north–south direction during the Variscan orogeny.

History

The Mont Blanc was the highest mountain of the Frankish Empire under Charlemagne and the highest mountain of the Holy Roman Empire until 1792.

Pierre Martel's 1744 map and sketch of the Chamonix valley contains what is considered the first printed appearance of the name "Mont Blanc".

In 1760, Swiss naturalist Horace-Bénédict de Saussure began to go to Chamonix to observe Mont Blanc. He tried to summit it with the Courmayeur mountain guide Jean-Laurent Jordaney, a native of Pré-Saint-Didier, who accompanied De Saussure since 1774 on the Miage Glacier and Mont Crammont.

The first recorded ascent of Mont Blanc (at the time neither within Italy nor France) was on 8 August 1786 by Jacques Balmat and the doctor Michel-Gabriel Paccard.

Climate

Located on the watershed between the Rhône and the Po, the massif of Mont Blanc is also situated between the two different climatic regions of the northern and western Alps and that of the southern Alps. Climatic conditions on the Mer de Glace are similar to those found on the northern side of the Swiss Alps.

The climate is cold and temperate (Köppen climate classification Cfb), and is greatly influenced by altitude. Being the highest part of the Alps, Mont Blanc and surrounding mountains can create their own weather patterns. Temperatures drop as the mountains gain in height, and the summit of Mont Blanc is a permanent ice cap, with temperatures around −20 °C (−4 °F). The summit is also prone to strong winds and sudden weather changes.

Geography and climate

Monte Rosa covers areas on both sides of the border between the Swiss canton of Valais and the Italian regions of Piedmont and Aosta Valley. The main summit of Monte Rosa is the Dufourspitze. On the Swiss side the town centre of Zermatt is about 13 km (8.1 mi) north-west and 3,000 m (9,800 ft) below it. On the Italian side of the massif are located 9 km (5.6 mi) north-east Macugnaga in the Valle Anzasca,11 km (6.8 mi) south-east-south Alagna Valsesia in the Valsesia and 13 km (8.1 mi) Gressoney-La-Trinité in the Val de Gressoney, respectively, away from the summit. The different sides of the mountain greatly differ from each other.

Tourism

The Monte Rosa massif is popular for mountaineering, hiking, skiing and snowboarding. It hosts several ski resorts with long pistes. Plateau Rosa, about 3,500 metres (11,500 ft) high above sea level, is a summer ski resort, with snow all year round due to the altitude. The Plateau Rosa is connected via aerial tramway to Cervinia and to Zermatt via the Klein Matterhorn. The western fringes of the massif reach the Zermatt ski domain. Gressoney, Champoluc, Alagna Valsesia and Macugnaga (under the east face, intensely glaciated and 2,500 metres (8,200 ft) high) are the main mountain and ski resorts that surround Monte Rosa along its southern side.

Geography

The Matterhorn has a pyramidal shape with four faces nearly facing the four compass points. Three of them (north, east and west) are on the Swiss side of the border and watershed (Mattertal valley), and one of them (south) is on the Italian side of the border (Valtournenche valley). The north face overlooks the Ober Gabelhorn (7 km away) across the Zmutt Glacier and valley (above Zermatt), the east face overlooks the Gorner Glacier system between the Gornergrat and Monte Rosa (respectively 10 and 17 km away) across the Theodul Pass, the west face overlooks the upper basin of the Zmutt Glacier between the Dent Blanche and the Dent d'Hérens (respectively 7 and 4 km away) and the south face fronts the resort town of Breuil-Cervinia and overlooks a good portion of the Valtournenche.

Geology

The Matterhorn's pyramid is composed of Paleozoic rocks, which were thrust over the Matterhorn's Mesozoic base during the Cenozoic. Quaternary glaciation and weathering give the mountain its current shape.

Apart from the base of the mountain, the Matterhorn is composed of gneiss belonging to the Dent Blanche klippe, an isolated part of the Austroalpine nappes, lying over the Penninic nappes. The Austroalpine nappes are part of the Apulian plate, a small continent that broke up from Africa before the Alpine orogeny. For this reason, the Matterhorn has been popularised as an African mountain. The Austroalpine nappes are mostly common in the Eastern Alps.

Climbing history

The Matterhorn was one of the last of the main Alpine mountains to be ascended, not because of its technical difficulty, but because of the fear it inspired in early mountaineers. The first serious attempts were all from the Italian side, although, despite appearances, the southern routes are technically more difficult. The main figures were Jean-Antoine Carrel and his uncle Jean-Jacques Carrel, from the Valtournenche area, who made the first attempts in 1857 and 1858, reaching 3,800 m (12,500 ft) on the latter occasion. In July 1860, three brothers from Liverpool attempted the mountain, Alfred, Charles and Sandbach Parker, but they turned back at about 3,500 m (11,500 ft).

History

Aegidius Tschudi, one of the earliest Alpine topographers and historians, was the first to mention the region around the Matterhorn in his work, De Prisca ac Vera Alpina Raethi, published in Basel in 1538. He approached the Matterhorn as a student when in his Alpine travels he reached the summit of the Theodul Pass, but he does not seem to have paid any particular attention to the mountain itself.

The Matterhorn remained unstudied for more than two centuries, until a geologist from Geneva, Horace Benedict de Saussure, travelled to the mountain, which filled him with admiration.

History of volcanic eruptions

Eruptions of Etna follow multiple patterns. Most occur at the summit, where there are five distinct craters: the Northeast Crater, the Voragine, the Bocca Nuova, and two at the Southeast Crater Complex. Other eruptions occur on the flanks, which have more than 300 vents ranging in size from small holes in the ground to large craters hundreds of metres across. Summit eruptions can be highly explosive and spectacular but rarely threaten the inhabited areas around the volcano. In contrast, flank eruptions can occur down to a few hundred metres altitude, close to or even well within inhabited areas. Numerous villages and small towns lie around or on cones of past flank eruptions.