Mountain Ranges, Deserts and Landforms of France

Geography

South America occupies the southern portion of the Americas. The continent is generally delimited on the northwest by the Darién watershed along the Colombia–Panama border, although some may consider the border instead to be the Panama Canal. Geopolitically and geographically, all of Panama – including the segment east of the Panama Canal in the isthmus – is typically included in North America alone and among the countries of Central America. Almost all of mainland South America sits on the South American Plate.

History

South America is thought to have been first inhabited by humans when people were crossing the Bering Land Bridge (now the Bering Strait) at least 15,000 years ago from the territory that is present-day Russia. They migrated south through North America, and eventually reached South America through the Isthmus of Panama.

Amongst the oldest evidence for human presence in South America is the Monte Verde II site in Chile, suggested to date to around 14,500 years ago. From around 13,000 years ago, the Fishtail projectile point style became widespread across South America, with its disappearance around 11,000 years ago coincident with the disappearance of South America's megafauna.

Economy

Since 1930, the continent has experienced growth and diversification in most economic sectors. Most agricultural and livestock products are destined for the domestic market and local consumption. However, the export of agricultural products is essential for the balance of trade in most countries.

The main agrarian crops are export crops, such as soy and wheat. The production of staple foods such as vegetables, corn or beans is large, but focused on domestic consumption. Livestock raising for meat exports is significant in Argentina, Paraguay, Uruguay and Colombia. In tropical regions the most important crops are coffee, cocoa and bananas, mainly in Brazil, Colombia and Ecuador.

Geology

The oldest rocks in the shield consist of Archean Imataca Complex, composed of a quartz-feldspar gneiss and subordinate mafic gneiss. The Guri Fault marks the southern boundary of the complex. South of that fault are Early Proterozoic rocks consisting of the metavolcanic Pastora Supergroup and the granitic plutonic Supamo Complex. The Cuchivero Group consists of ash flow tuff and granitic plutonic rocks. The Early to Middle Proterozoic Roraima Group consists of continental clastic sedimentary rocks. These Precambrian sediments include quartz sandstones, quartzites, and conglomerates presumed to be 1.8 to 1.4 Ga in age.

Ecology

The Guiana Shield is one of the world's most biodiverse regions, and has many endemic species. The region houses over 3000 vertebrate species: 1168 fresh water fish, 269 amphibians (54% endemics), 295 reptiles (29%), 1004 birds (7.7%), and 282 mammals (11%). Diversity of invertebrates remains largely undocumented, but there are several species of endemic butterflies and dung beetles.

Plant life is equally rich and 13,367 species of vascular plants have been found, approximately 40% of which is considered endemic. The shield is overlain by the largest expanse of tropical forest on any Precambrian shield area in the world.

Geography

The Alps are a crescent shaped geographic feature of central Europe that ranges in an 800 km (500 mi) arc (curved line) from east to west and is 200 km (120 mi) in width. The mean height of the mountain peaks is 2.5 km (1.6 mi). The range stretches from the Mediterranean Sea north above the Po basin, extending through France from Grenoble, and stretching eastward through mid and southern Switzerland. The range continues onward toward Vienna, Austria, and southeast to the Adriatic Sea and Slovenia. Depending on the definitions used, the Alpokalja foothills in western Hungary may also qualify as part of the Alps.

To the south it dips into northern Italy and to the north extends to the southern border of Bavaria in Germany.

Geology

Important geological concepts were established as naturalists began studying the rock formations of the Alps in the 18th century. In the mid-19th century, the now-defunct idea of geosynclines was used to explain the presence of "folded" mountain chains. This theory was replaced in the mid-20th century by the theory of plate tectonics.

The formation of the Alps (the Alpine orogeny) was an episodic process that began about 300 million years ago. In the Paleozoic Era the Pangaean supercontinent consisted of a single tectonic plate; it broke into separate plates during the Mesozoic Era and the Tethys sea developed between Laurasia and Gondwana during the Jurassic Period.

Ecology

Thirteen thousand species of plants have been identified in the Alpine regions. Alpine plants are grouped by habitat and soil type which can be limestone or non-calcareous. The habitats range from meadows, bogs, and woodland (deciduous and coniferous) areas to soil-less scree and moraines, and rock faces and ridges. A natural vegetation limit with altitude is given by the presence of the chief deciduous trees—oak, beech, ash and sycamore maple. These do not reach the same elevation, nor are they often found growing together, but their upper limit corresponds accurately enough to the change from a temperate to a colder climate that is further proved by a change in the presence of wild herbaceous vegetation.

History

When the ice melted after the Würm glaciation, Paleolithic settlements were established along the lake shores and in cave systems. Evidence of human habitation has been found in caves near the Vercors Cave System, close to Grenoble and Echirolles. In Austria, the Mondsee lake shows evidence of houses built on piles. Standing stones have been found in the Alpine areas of France and Italy. About 200,000 drawings and etchings have been documented, and are known as the Rock Drawings in Valcamonica.

A mummy of a Neolithic human, known as Ötzi, was discovered on the Similaun.

Geography and geology

The Massif Central is an old massif, formed during the Variscan orogeny, consisting mostly of granitic and metamorphic rocks. It was powerfully raised and made to look geologically younger in the eastern section by the uplift of the Alps during the Paleogene period and in the southern section by the uplift of the Pyrenees. The massif thus presents a strongly asymmetrical elevation profile with highlands in the south and in the east (Cévennes) dominating the valley of the Rhône and the plains of Languedoc and, by contrast, the less elevated region of Limousin in the northwest.

These tectonic movements created faults and may be at the origin of the volcanism in the massif (but the hypothesis is not yet proven).

Economy

In the Massif Central, the industry remains little developed except locally (metallurgy in Saint-Étienne; tyres in Clermont-Ferrand, headquarters of Michelin, world leader in the sector; aeronautics industry in Figeac, etc.). The other industries present are linked to agriculture (Groupe Limagrain, the world's third-largest seed producer and cheese-producing industries that export to the world such as Cantal and Roquefort).

On the agricultural level, the Limagne plain is dominated by major cereal crops, but in the mountains, it is mainly livestock farming that predominates: cattle farming in the west for meat and milk (Cantal cheese), sheep farming in the south on the limestone plateaus (Roquefort cheese).

Geography

The Spanish Pyrenees are part of the following provinces, from east to west: Girona, Barcelona and Lleida (all in Catalonia), Huesca and Zaragoza (both in Aragon), Navarra (in Navarre) and Gipuzkoa (in the Basque Country).

The French Pyrenees are part of the following départements, from east to west: Pyrénées-Orientales (also known as Northern Catalonia), Aude, Ariège, Haute-Garonne, Hautes-Pyrénées, and Pyrénées-Atlantiques (the latter two of which include the Pyrenees National Park).

The independent principality of Andorra is sandwiched in the eastern portion of the mountain range between the Spanish Pyrenees and French Pyrenees.

Physiographically, the Pyrenees may be divided into three sections: the Atlantic (or Western), the Central, and the Eastern Pyrenees.

Geology

The Pyrenees are older than the Alps: their sediments were first deposited in coastal basins during the Paleozoic and Mesozoic eras. During Ediacaran to Ordovician times, Pyrenees were located at the Northwest margin of Gondwana, where they formed a lateral continuity of neighbouring areas, such as the Montagne Noire and the Mouthoumet massifs and Southwestern territory of Sardinia. Between 100 and 150 million years ago, during the Early Cretaceous Period, the Bay of Biscay fanned out, pushing present-day Spain against France and applying intense compressional pressure to large layers of sedimentary rock. The intense pressure and uplifting of the Earth's crust first affected the eastern part and moved progressively to the entire chain, culminating in the Eocene Epoch.

Climate

The amount of precipitation the range receives, including rain and snow, is much greater in the western than in the eastern Pyrenees because of the moist air that blows in from the Atlantic Ocean over the Bay of Biscay. After dropping its moisture over the western and central Pyrenees, the air is left dry over the eastern Pyrenees. The winter average temperature is −2 °C (28 °F).

Sections of the mountain range vary in more than one respect. There are some glaciers in the western and snowy central Pyrenees, but there are no glaciers in the eastern Pyrenees because there is insufficient snowfall to cause their development.

Geography

The Higher Vosges or High Vosges (Hautes Vosges), extending in the southern part of the range from Belfort to the river valley of the Bruche. The rounded summits of the Hautes Vosges are called ballons in French, literally "balloons".

The Lower Vosges or Low Vosges (48 km, 30 mi), commonly known as North Vosges, a sandstone plateau ranging from 300 metres (1,000 ft) to 560 metres (1,850 ft) high, between the Col de Saverne and the source of the Lauter.

In addition, the term "Central Vosges" is used to designate the various lines of summits, especially those above 1,000 m (3,300 ft) in elevation. The French department of Vosges is named after the range.

Climate

Meteorologically, as a consequence of the Foehn effect the difference between the eastern and western mean slopes of the range is very marked. The main air streams come generally from the west and southwest, so the Alsatian central plains just under the Hautes-Vosges receive much less precipitation than the southwest slope of the Vosges Mountains. The highlands of the canton of Remiremont receive as annual rainfall or snowfall more than 2,000 mm (79 in) of precipitation yearly, whereas some dry countryside near Colmar receives less than 500 mm (20 in) of precipitation in the event of insufficient storms. The temperature is much lower in the west front of the mountains than in the low plains behind the massif, especially in summer.

History

The massif known in Latin as Vosago mons or Vosego silva, sometimes Vogesus mons, was extended to the vast woods covering the region. Later, German speakers referred to the same region as Vogesen or Wasgenwald.

Over the centuries, settlement population density grew gradually, as was typical for a forested region. Forests were cleared for agriculture, livestock and early industrial factories (such as charcoal works and glassworks) and the water mills used water power. Concentrations of settlement and immigration took place and not only in areas where minerals were found. In the mining area of the Lièpvrette valley, for example, there was an influx of Saxon miners and mining specialists.

Geography

Much of the Ardennes is covered in dense forests, with the hills averaging around 350–400 m (1,150–1,310 ft) in height but rising to over 694 m (2,277 ft) in the boggy moors of the High Fens region of south-eastern Belgium. The region is typified by steep-sided valleys carved by swift-flowing rivers, the most prominent of which is the Meuse. Its most populous cities are Verviers in Belgium and Charleville-Mézières in France, both exceeding 50,000 inhabitants. The Ardennes is otherwise relatively sparsely populated, with few of the towns exceeding 10,000 inhabitants. (Exceptions include Belgium's Eupen and Bastogne.)

The Eifel range in Germany adjoins the Ardennes and is part of the same geological formation, although they are conventionally regarded as being two distinct areas.

Geology

The Ardennes are the remnants of a mountain range formed during the Hercynian orogeny; in France similar formations are the Armorican Massif, the Massif Central, and the Vosges. The low interior of such former mountains often contains coal, plus iron, zinc and other metals in the sub-soil. This geologic fact explains the greatest part of the geography of Wallonia and its history. In the North and West of the Ardennes lie the valleys of the Sambre and Meuse rivers, forming an arc (Sillon industriel) going across the most industrial provinces of Wallonia, for example Hainaut Province, along the river Haine (the etymology of Hainaut); the Borinage, the Centre and Charleroi along the river Sambre; Liège Province along the river Meuse.

History

The modern Ardennes region covers a greatly diminished area from the forest recorded in Roman times.

A song about Charlemagne, the Old French 12th-century chanson de geste Quatre Fils Aymon, mentions many of Wallonia's rivers, villages and other places. In Dinant the rock named Bayard takes its name from Bayard, the magic bay horse which, according to legend, jumped from the top of the rock to the other bank of the Meuse.

On their pillaging raids in the years 881 and 882, the Vikings used the old Roman roads in the Ardennes, attacking the abbeys of Malmedy and Stavelot and destroying Prüm Abbey in the Eifel.

The strategic position of the Ardennes has made it a battleground for European powers for many centuries.

Economy

The Ardennes includes the greatest part of Belgium's Luxembourg Province (not to be confused with the neighbouring Grand Duchy of Luxembourg), the south of Namur Province, and Liège Province, plus a very small part of Hainaut Province, as well as the northernmost third of the Grand Duchy of Luxembourg, called "Éislek" (German: Ösling) and the main part of the French Ardennes department.

Ecology

Some alpine butterfly populations have reduced markedly recently. Butterflies have been shown to be more vulnerable to climate change than birds. A study of three such alpine butterfly species over a period of the last glacial cycle suggests habitat loss and its deterioration are major drivers of this decline in population.

Tourism

The Jura range offer a variety of tourist activities including hiking, cycling, downhill skiing and cross-country skiing. There are many signposted trails including the Jura ridgeway, a 310 km (190 mi) hiking route. Several peaks feature observation towers (e.g. Faux d'Enson, Hage).

Tourist attractions in the Swiss Jura include natural features such as the Creux du Van, lookout peaks such as the Chasseral, caves such as the Grottes de Vallorbe, as well as gorges such as Taubenloch. The Swiss Jura has been industrialized since the 18th century and became a major centre of the watchmaking industry.