\paperw4260 \margr0\margl0 \plain \qj\li105\ri105 \f1 \b The gorges of the Tarn\par
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\b0 A small river in the Massif Central, the Tarn flows into the Garonne after cutting
its way, along natural faults, through 25 km (15 mls) of the soft limestone of the Causses, creating a landscape of vast expanses of desolation, with scant vegetation and dotted with isolated farms given over to the raising of sheep. Today it flows at th
e bottom of canyons that can be as deep as 60 m (200 ft) through the middle of a region where numerous caves have been formed, such as the \i Aven Armand\i0 with its impressive forest of stalagmites.\par
