Graitery
| Graitery | ||
|---|---|---|
| height | 1280 m above sea level M. | |
| location | Canton of Bern , Switzerland | |
| Mountains | law | |
| Dominance | 2.33 km → Grenchenberg | |
| Notch height | 140 m ↓ aux Boeufs | |
| Coordinates | 596051 / 233855 | |
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The Graitery is a 1280 m above sea level. M. high ridge in the Jura in the Swiss canton of Bern .
location
The summit is on the border of the parishes of Court and Moutier . East of the saddle of the Loge aux Bœufs ( 1130 m above sea level ) follows the Oberdörferberg , which at 1297 m above sea level. M. is a bit higher than the Graitery in the narrower sense, but also belongs to this mountain range. The canton border between Bern and Solothurn runs on the ridge of the Oberdörferberg . The mountain name originally goes back to the Latin word cratire (eggen).
The ridge of the Graitery extends over a length of about 8 km in a west-east direction according to the general fold structure of the Jura in this region. On average, it is around 2 to 3 km wide. The height of the graitery is limited in the north by the so-called Grand Val , the valley basin of Moutier, in the south by the valleys of Chaluet (easternmost section of the Juralängstals Vallée de Tavannes ) and Binzberg . Both the western and the eastern delimitation are marked by two characteristic Jurassic clusters . In the west are the Gorges de Court , through which the Birs flows, while in the east lies the Klus von Gänsbrunnen.
geology
In structural geological terms, the Graitery forms an anticline of the Jura folds . The upcoming competent rock layers of the upper Jurassic period ( Malm ) are particularly open on the steep north flank and in the Klus von Court. The hard limestone in the apex of the anticline was partially removed by erosion, so that the underlying softer clays and marls of the effinger layers were exposed. In the area of the Loge aux Bœufs saddle , creeks have dug themselves deep into the north and south flanks of the ridge, which is why the competent limestone layers of the upper Jura are completely eroded here. The ridge of the Oberdörferberg to the east, on the other hand, is again made of Malm limestone. To the east of the Gänsbrunnen gorge, the Graitery anticline continues in Walenmattberg . To the west of the Gorges de Court, the anticline continues in Mont Girod ( 1045 m above sea level ) before it ends at Champoz at the foot of the Moron .
The steep flanks of the Graitery are covered with thick beech and fir forests. In the ridge area there are extensive Jura high pastures and several mountain farms. Since 1915 the Graitery has been crossed by the approximately 8.6 km long Grenchenberg tunnel of the Jura Railway, which is why the structural geology of the anticline could be studied in detail. The preparatory work for the construction of the 2.4 km long Graitery tunnel on the A16 is currently underway .
