Les Ulis topographic map
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Les Ulis
The source of the minor river Rouillon (river) is in the neighbouring town of Villejust, close to the communal border. The lowest point of the town, at the point where it meets Bures-sur-Yvette, is at an altitude of 87m. Most of the town is situated at an average altitude of over 150m. Its highest point is at 170m. The land on which it is built consists of clay, sand and millstone.
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Name: Les Ulis topographic map, elevation, terrain.
Average elevation: 138 m
Minimum elevation: 60 m
Maximum elevation: 174 m
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Paris Basin
France > Ile-de-France > Essonne > Bièvres
The landscape is one of very broad valleys (flood plains), modest watershed hills and well-drained plateaux of comparatively little altitude. In the south-east and east the plain of Champagne and the Seuil de Bourgogne (Threshold of Burgundy) differential erosion of the strata has left low scarps with the dip…
Average elevation: 126 m