Isla Grande de Tierra del Fuego

Isla Grande de Tierra del Fuego

View of a part of Tierra del Fuego
Isla Grande de Tierra del Fuego
Geography
Location Tierra del Fuego
Coordinates 54°00′S 69°00′W / 54.000°S 69.000°W / -54.000; -69.000Coordinates: 54°00′S 69°00′W / 54.000°S 69.000°W / -54.000; -69.000
Archipelago Tierra del Fuego
Area 47,992 km2 (18,530 sq mi)
Area rank 29th
Highest elevation 2,488 m (8,163 ft)
Highest point Mount Darwin
Country
Province  Tierra del Fuego, Antarctica, and South Atlantic Islands Province
Largest settlement Río Grande (pop. 67,038)
Region  Magallanes y Antártica Chilena
Largest settlement Porvenir (pop. 4,807)

Tierra del Fuego—literally Fire Land, formerly Isla de Xativa[1] and also known as Isla Grande de Tierra del Fuego—is an island near the southern tip of South America from which it is separated by the Strait of Magellan. The western portion of the island (29,484.7 km² and 61.43% of the island) is in Chile (Province of Tierra del Fuego and Antártica Chilena Province), while the eastern portion (18,507.3 km² and 38.57%) is in Argentina (Tierra del Fuego Province). It forms the major landmass in an extended group of islands or archipelago also known as Tierra del Fuego.

The island has an area of 47,992 km², making it the 29th largest island in the world. Its two biggest towns are Ushuaia and Río Grande, both in Argentina, while its highest point is Monte Darwin (2,488 m), in Chile. Other towns are Tolhuin, Porvenir, Camerón, and Cerro Sombrero. The northern parts of the island have oil deposits; Cerro Sombrero in Chile is the main extraction centre in the island.

In 1949 an earthquake occurred in the Chilean portion, near the Argentine border. Recorded as 7.8 on the Richter scale, it was the most powerful ever recorded in the south of Argentina.[2]

Geography

Tierra del Fuego is bounded on the east by the South Atlantic, on the north by the Magellan Straits and on the south and west by a series of fjords and channels linked to the Pacific Ocean. One of the few prominent features of the northwest shore is San Sebastián Bay. To the south the island is bounded by the Beagle Channel, south of which lie a series of islands included in Chilean territory. To the west the island has two major inlets, Inútil Bay and Almirantazgo Fjord. The latter lies along the Magallanes–Fagnano Fault and is a continuation of the Cami Lake depression in southern Tierra del Fuego.

The southwest part of the island, between the Almirantazgo Fjord and the Beagle Channel and extending west to end at Brecknock Peninsula on the Pacific Ocean, is mountainous with a heavily indented coastline, dominated by the Cordillera Darwin. Most of this part of the island is included in the Alberto de Agostini National Park of Chile.

History

The earliest human settlement occurred more than 10,000 years ago, as people migrated from the mainland, perhaps under pressure from competitors. The Yaghan people were some of the earliest known humans settling in Tierra del Fuego. Certain archeological sites at locations such as Navarino Island, within the islands of Tierra del Fuego, have yielded artifacts and evidence of their culture from the Megalithic era.

The name Tierra del Fuego derives from Portuguese explorer Ferdinand Magellan, who was the first European to visit these lands in 1520, while sailing for Spain. He believed he was seeing the many fires (fuego in Spanish) of the Amerindians, which were visible from the sea and that the "Indians" were waiting in the forests to ambush his armada. These were fires lit by the Yamana Indians who lived in the northern part of the island, to ward off the low temperatures in the area. Originally called the "Land of Smoke," it was later changed to the more exciting "Land of Fire."

The British commander Robert Fitzroy, on his first voyage with the HMS Beagle in 1830, captured four native Fuegians after they stole a boat from his ship. The men included Orundellico, later named Jemmy Button by his crew. Fitzroy taught them English and took them with him on his return to England, where he took them to Court to meet the King and Queen in London. They became early celebrities. The surviving three were returned to Tierra del Fuego on the second voyage of the Beagle, which included the naturalist Charles Darwin, who made extensive notes about his visit to the islands.

In 1881 the island was divided between Argentina and Chile, each of which had previously claimed it entirely.

The 1949 Tierra del Fuego earthquake took place on 17 December 1949, at 06:53:30 AM. It recorded magnitude 7.8 in the Richter scale. Its epicenter was located in the east of the Chilean Tierra del Fuego Province, close to the Argentine border, at a depth of 30 km (19 mi).[2]

This was the most powerful earthquake ever recorded in the south of Argentina. It was felt with grade VIII in the Mercalli intensity scale, and affected the settlements and some others like Punta Arenas and Río Gallegos. Due to low population density, damage was limited.[2]

Climate

The climate in this region is a subpolar oceanic climate (Köppen climate classification Cfc) with short, cool summers and long, wet, moderate winters. The northeast is characterized by strong winds and little precipitation, while in the south and west it is very windy, foggy, and wet most of the year, with precipitation levels averaging 3,000 millimetres (120 in) a year. The permanent snow line begins at 700 metres (2,300 ft).

Flora

Only 30% of the islands have forests, which are classified as Magellanic subpolar; the northeast is made up by steppe and cool semidesert.

There are six species of tree found in Tierra del Fuego: Canelo or Winter's Bark (Drimys winteri), Maytenus magellanica, Pilgerodendron uviferum the southernmost conifer in the world, and three kinds of southern beech; Nothofagus antarctica, Nothofagus pumilio and the evergreen Nothofagus betuloides. Edible fruits grow in open spaces in these forests, such as beach strawberry (Fragaria chiloensis var. chiloensis forma chiloensis) and calafate (Berberis buxifolia), which have been collected by Indians and residents alike. These forests are unique in the world for having developed in a climate with such cold summers. Tree cover extends very close to the southernmost tip of South America. Winds are so strong that trees in wind-exposed areas grow twisted by the force of winds, and people call the trees "flag-trees" for the shape that they need to take in the fight with the wind. Tree vegetation extends as far south as the Isla de los Estados, Navarino Island and the north of Hoste Island. At altitudes above, dwarf nothofagus communities are found. Going further south, Wollaston Islands and the south of Hoste Island are covered by subantarctic tundra.

The forests of Tierra del Fuego have been a source of trees that have been planted abroad in places with a similar climate but that were devoid of trees, such as the Faroe Islands and nearby archipelagos. Most species were gathered from the coldest places in Tierra del Fuego bordering the tundra. This resulted in positive changes, as the heavy winds and cool summers in the Faroe Islands had not formerly allowed the growth of trees from other regions in the world. In the Faroe Islands, the imported trees are used ornamentally, as curtains against wind, and for fighting erosion caused by storms and grazing.

Economy

The main industries are oil, natural gas, sheep farming and ecotourism. On the Argentine side several electronics companies have been established. Ushuaia is home to the small brewing company Cervecería Fueguina, which produces three beers under the Beagle brand name.

See also

References

  1. ↑ Tierra de Fuego, antes «Isla de Xativa»
  2. 1 2 3 (Spanish) Instituto Nacional de Prevención Sísmica. Listado de Terremotos Históricos.gistering

External links

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