Campidano ( Sardinian : Campidànu ) is a plain located in South-Western Sardinia ( Italy ), covering approximately 100 kilometres between Cagliari and Oristano .
6-643: Geologically, it is a graben , a tectonic structure formed in the mid- Pliocene /early Pleistocene (4 to 2 million years ago). Later it was subject to large sedimentary deposition phenomena, creating an overall thickness of 600 m of sediments. The plain is crossed by the Tirso River , the longest in Sardinia. Agriculture has been successful in Campidano since the Neolithic , continuing on through
12-406: Is a stub . You can help Misplaced Pages by expanding it . Graben In geology , a graben ( / ˈ ɡ r ɑː b ən / ) is a depressed block of the crust of a planet or moon, bordered by parallel normal faults . Graben is a loan word from German , meaning 'ditch' or 'trench'. The first known usage of the word in the geologic context was by Eduard Suess in 1883. The plural form
18-405: Is either graben or grabens . A graben is a valley with a distinct escarpment on each side caused by the displacement of a block of land downward. Graben often occur side by side with horsts . Horst and graben structures indicate tensional forces and crustal stretching. Graben are produced from parallel normal faults, where the displacement of the hanging wall is downward, while that of
24-670: The Punic and the Romans , who cultivated here grains and grape. Dams of the large Sardinian rivers nourish the artichoke and wheat cultures, also typical products of this zone. Paddy fields are present near Oristano. The Sardinians from this area, and by extension all the people inhabiting the lowlands of Southern Sardinia, are called Campidanese ( Sardinian : Campidanesus , Italian : Campidanesi ). 39°36′00″N 8°54′00″E / 39.6000°N 8.9000°E / 39.6000; 8.9000 This Sardinia location article
30-463: The footwall is upward. The faults typically dip toward the center of the graben from both sides. Horsts are parallel blocks that remain between graben; the bounding faults of a horst typically dip away from the center line of the horst. Single or multiple graben can produce a rift valley . In many rifts , the graben are asymmetric, with a major fault along only one of the boundaries, and these are known as half-graben. The polarity (throw direction) of
36-419: The main bounding faults typically alternates along the length of the rift. The asymmetry of a half-graben strongly affects syntectonic deposition. Comparatively little sediment enters the half-graben across the main bounding fault because of footwall uplift on the drainage systems. The exception is at any major offset in the bounding fault, where a relay ramp may provide an important sediment input point. Most of
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