Madersberg
| Madersberg | ||
|---|---|---|
 Madersberg from the northeast |
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| height | 540 m above sea level A. | |
| location | Styria , Austria | |
| Mountains | Grazer Bergland , Lavanttal Alps | |
| Dominance | 0.44 km → Mühlberg | |
| Notch height | 79 m ↓ Unterbichl | |
| Coordinates | 47 ° 5 '4 " N , 15 ° 22' 1" E | |
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| rock | Limes , dolomites | |
| Age of the rock | Middle Devon | |
The Madersberg (formerly also Madischberg ) is 540 m above sea level. A. high hill in the western part of the Grazer Bergland in the Austrian state of Styria . The survey is located in the market town of Thal near Graz .
Location and surroundings
The Madersberg rises about 120 meters on the left above the Thaler Graben. Across the stream of the same name , which marks the border with Graz , lies the Plabutsch, the highest point in the state capital. To the north , the Winkelbach breaks through the ridge in the Fuchsloch and separates the Madersberg from the Frauenkogel , to the south the Erlenbach in turn separates the hill from the Thaler Kirchberg. The Riedel von Unterbichl joins the comparatively gentle western slope, which divides the Thaler basin into itself. The summit of the mountain completely wooded Mader is only accessible on an unmarked footpath and part of the Protected Landscape Area Western hills and mountains of Graz (LSG-29).
Geology and geomorphology
The Madersberg is made up of limestone and dolomites from the Middle Devonian , which belong to the Graz Paleozoic . Particularly widespread are light gray, fine-grained , densely filled limestones, such as those found on the western slopes of Mühlberg, Gaisberg and Kollerberg as well as on Kirchberg to the south. In contrast to the barrande layers that occur in the immediate vicinity, weathered areas also remain light. This lithology leads to typical wall formations. In a now abandoned quarry near the former Thaler Mühle, so-called chonete slate was found stored in the dolomite. These are gray, fine-grained, dolomitic clay sandstones that represent the Barrandei coral limestone.
The hill is bounded both north and south by fault lines across the orographic strike direction through which streams and roads run today. The northern fault, which separates the Madersberg from the Frauenkogel, is an extension of the Fürstenstandbruch . Two further east-west faults divide the Madersberg into three blocks, of which the middle one has sunk. Beneath the ridge are pentameric banks falling 30 degrees west-northwest , which often have graphitic layers as a sign of high compressive stress . The southern block is in turn torn apart by several northeast-southwest faults. The chopped, sometimes mylonisierte and numerous Calcitäderchen laced rock was as fossilarm described.
Literature and maps
- Josef Hanselmayer: Contributions to sediment petrography of the Graz area III. In: Session reports of the Academy of Sciences, mathematical and natural science class , Volume 162, Vienna 1953, pp. 1–9. Online PDF , accessed January 2, 2019.
- Alois Kuntschnig: Geological map of the Plabutsch-Kollerkogel mountain range. In: Communications from the Natural Science Association for Styria. Vol. 74, Graz 1937, pp. 114-132.
- City map Graz 1: 15,000. Freytag & Berndt , Vienna 2017, ISBN 978-3850841146 .
- Austrian map 1: 50,000, sheet 4229 ( UTM ). Federal Office for Metrology and Surveying .
Web links
Individual evidence
- ↑ Landscape protection area No. 29. (PDF) State of Styria , accessed on April 30, 2020 .
- ^ Josef Hanselmayer: Contributions to sediment petrography of the Graz area III. In: Session reports of the Academy of Sciences, mathematical and natural science class , Volume 162, Vienna 1953, pp. 1–9. Online PDF , accessed May 2, 2020.
- ↑ Alois Kuntschnig: Geological Map of the mountain train Plabutsch-Koller Kogel. In: Communications from the Natural Science Association for Styria. Vol. 74, Graz 1937, pp. 114-132.