HOME

TheInfoList



OR:

The Sidobre is a mountainous area located in the south of the
Massif central The (; oc, Massís Central, ; literally ''"Central Massif"'') is a highland region in south-central France, consisting of mountains and plateaus. It covers about 15% of mainland France. Subject to volcanism that has subsided in the last 10,00 ...
, in central
France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of Overseas France, overseas regions and territories in the Americas and the Atlantic Ocean, Atlantic, Pacific Ocean, Pac ...
. It consists of a plateau made of
granite Granite () is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies undergro ...
, 15.3 km long, 6.6 km wide and covered with forests. Its highest point is in the ''
lieu-dit ''Lieu-dit'' (; plural: ''lieux-dits'') (literally ''said-location'') is a French toponymic term for a small geographical area bearing a traditional name. The name usually refers to some characteristic of the place, its former use, a past event, ...
'' “Le Patau” (707 m).


Location

It is located in the Tarn department, at the South-Western end of the
Massif central The (; oc, Massís Central, ; literally ''"Central Massif"'') is a highland region in south-central France, consisting of mountains and plateaus. It covers about 15% of mainland France. Subject to volcanism that has subsided in the last 10,00 ...
, between Lacrouzette, Ferrières, Saint-Salvy-de-la-Balme and Lafontasse, surrounded by the following natural regions : * East : the Mounts of Lacaune * South : the
Montagne Noire The Montagne Noire ( oc, Montanha Negra, known as the 'Black Mountain' in English) is a mountain range in central southern France. It is located at the southwestern end of the Massif Central at the juncture of the Tarn, Hérault and Aude departm ...
* West : territory of
Castres Castres (; ''Castras'' in the Languedocian dialect, Languedocian dialect of Occitan language, Occitan) is the sole Subprefectures in France, subprefecture of the Tarn (department), Tarn Departments of France, department in the Occitania (administ ...


Geology

The granite of the Sidobre is a
plutonic rock Intrusive rock is formed when magma penetrates existing rock, crystallizes, and solidifies underground to form '' intrusions'', such as batholiths, dikes, sills, laccoliths, and volcanic necks.Intrusive RocksIntrusive rocks accessdate: March ...
resulting from a Hercynian intrusion dated back (using the Rubidium-Strontium method) to 304 ± 8 Ma. The magma cooled down slowly and crystallised at a depth of 7.5 to 20 km. It eventually came to the surface with the erosion of the
Cambrian The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million ...
metamorphic rocks. In the central part of the ''massif'', the granite is a slightly
porphyric Porphyry ( ) is a textural term for an igneous rock consisting of coarse-grained crystals such as feldspar or quartz dispersed in a fine-grained silicate-rich, generally aphanitic matrix or groundmass. The larger crystals are called phenocr ...
granodiorite Granodiorite () is a coarse-grained (phaneritic) intrusive igneous rock similar to granite, but containing more plagioclase feldspar than orthoclase feldspar. The term banatite is sometimes used informally for various rocks ranging from gra ...
, hence its blue tints, while the outer part is essentially composed of
monzonite Monzonite is an igneous intrusive rock, formed by slow cooling of underground magma that has a moderate silica content and is enriched in alkali metal oxides. Monzonite is composed mostly of plagioclase and alkali feldspar. Syenodiorite is an o ...
.


Sites

Originally composed by one single piece of rock, the Sidobre was cracked by the Pyrenean orogeny, thus becoming more exposed to the
rhexistasy The theory of biorhexistasy describes climatic conditions necessary for periods of soil formation (pedogenesis) separated by periods of soil erosion. Proposed by pedologist Henry Erhart in 1951, the theory defines two climatic phases: biostasy and ...
, which explain the remarkable natural forms and constructions of the site. The Sidobre, while just adjacent to it, is totally independent from the
Montagne Noire The Montagne Noire ( oc, Montanha Negra, known as the 'Black Mountain' in English) is a mountain range in central southern France. It is located at the southwestern end of the Massif Central at the juncture of the Tarn, Hérault and Aude departm ...
. They are separated by the
sedimentary basin Sedimentary basins are region-scale depressions of the Earth's crust where subsidence has occurred and a thick sequence of sediments have accumulated to form a large three-dimensional body of sedimentary rock. They form when long-term subsidence ...
of
Castres Castres (; ''Castras'' in the Languedocian dialect, Languedocian dialect of Occitan language, Occitan) is the sole Subprefectures in France, subprefecture of the Tarn (department), Tarn Departments of France, department in the Occitania (administ ...
and the channel of the river
Thoré The Thoré () is a river in the Hérault and Tarn departments in southern France. Its source is in the northern part of Rieussec. It flows generally northwest. It is a left tributary of the Agout, into which it flows between Navès and Castr ...
”. This stunning site, with its dozens of huge strange-shaped rocks, is unique in Europe (other sites exist in France, but in a much smaller scale), and has inspired many legends and tales. Image:Sidobre Peyro Clabado1.jpg, Le Peyro Clabado, on the commune of Lacrouzette Image:Sidobre Peyro Clabado2.jpg, Le Peyro Clabado Image:Sidobre Roc Oie.jpg, Le Roc de l'Oie (« The Rock of the Goose ») Image:Sidobre Saut Truite.jpg, Waterfall in the Sidobre Image:Rocher tremblant sept faux.jpg, Trembling rock in Sept-Faux


Economy

The Sidobre is an important zone of quarrying, representing half of the granite production in France, with about 1,200 employees and 100 companies. Because of competition from China, there has been a steady decrease in the number of quarries since the 1950s, with barely fifteen nowadays, though these have grown bigger. The granite is used for many purposes: pavements, airport runways, funerary art… While mass tourism is still uncommon in the area, local tourism also contributes to the Sidobre's economy. The site and its environment have been placed under the protection of the
Haut-Languedoc Regional Nature Park A mouflon in the park. Haut-Languedoc Regional Nature Park (french: Parc naturel régional du Haut-Languedoc) is a regional natural park in the south of the Massif Central within the Aveyron, Hérault, and Tarn departments of France. These ar ...
.


See also

*
Tourism in Tarn The Tarn department is situated in the southwest of France. Statistics In 2009, there were : * Nightly rentals : 8.6 million * Beds available : 23,100 * Business hotels represented 305,000 tourists for a total of 470,200 nights * Campsites repres ...


External links


Sidobre-information
{{Authority control Massif Central Geography of Tarn (department)