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LANDES

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Originally appearing in Volume V16, Page 155 of the 1911 Encyclopedia Britannica.
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LANDES , an extensive natural region of See also:

south-western See also:France, known more strictly as the Landes de Gascogne. It has an See also:area of 5400 sq. m., and occupies three-quarters of the See also:department of Landes, See also:half of that of See also:Gironde, and some 175,000 acres of See also:Lot-et-See also:Garonne. The Landes, formerly a vast See also:tract of moorland and See also:marsh, now consist chiefly of See also:fields and forests of pines. They See also:form a See also:plateau; shaped like a triangle, the See also:base of which is the See also:Atlantic See also:coast while the See also:apex is situated slightly See also:west of See also:Nerac (Lot-et-Garonne). Its limits are, on the S. the See also:river See also:Adour; on the E. the hills of See also:Armagnac, Eauzan, Condomois, See also:Agenais and Bazadais; and on the N.E. the Garonne, the hills of Medoc and the Gironde. The height of the plateau ranges in See also:general from 130 to 260 ft.; the highest See also:altitude (498 ft.) is found in the See also:east near Baudignan (department of Landes), from which point there is a See also:gradual slope towards See also:north, south, east and west. The See also:soil is naturally sterile. It is composed of See also:fine See also:sand resting on a subsoil of tufa (See also:alias) impermeable by See also:water; for three-quarters of the See also:year, consequently, the See also:waters, settling on the almost level See also:surface and unable to See also:filter through, used to trans-form the See also:country into unwholesome swamps, which the Landesats could only See also:traverse on See also:stilts. About the See also:middle of the 18th See also:century an engineer, See also:Francois Chambrelent, instituted a See also:scheme of draining and planting to remedy these evils. As a result about 1600 m. of ditches have been dug which carry off superficial water either to streams or to the lakes which fringe the landes on the west, and over 1,600,000 acres have been planted with maritime pines and oaks. The coast, for a breadth of about 4 m., and over an area of about 225,000 acres, is bordered by See also:dunes, in ranges parallel to the See also:shore, and from 10o to 300 ft. in height. Driven by the west See also:wind, which is most frequent in these parts, the dunes were slowly advancing year by year towards the east, burying the cultivated lands and even the houses.

See also:

Nicolas See also:Thomas Bremontier, towards the end of the 18th century, devised the See also:plan of arresting this See also:scourge by planting the dunes with maritime pines. Upwards of 210,000 acres have been thus treated. In the south-west, See also:cork trees take the See also:place of the pines. To prevent the formation of fresh dunes, a "dune littorale" has been formed by means of a palisade. This barrier, from 20 to 30 ft. high, presents an obstacle which the sand cannot See also:cross. On the eastern See also:side of the dunes is a See also:series of lakes (Hourtin et Carcans, Lacanau, Cazau or Sanguinet, Biscarrosse, Aureilhan, St See also:Julien, See also:Leon and Soustons) separated from the See also:sea by the heaping up of the sand. The See also:salt water has escaped by defiltration, and they are now quite fresh. The See also:Basin of See also:Arcachon, which lies midway between the lakes of Lacanau and Cazau, still communicates with the ocean, the current of the Leyre which flows into it having sufficient force to keep a passage open.

End of Article: LANDES

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