Wind Abrasion and Glacial Striations on the Kleiner Berg

Naumann-Heim-Felsen, Foto: Archiv Geopark Porphyrland
  • Geotope type: Glacial marks on a rock
  • Rocks: Hohburg quartz porphyry
  • Geological period: Quaternary (Elster, Saale and Weichsel glacial period)

The glacial striations or abrasion marks are situated below the top of the small hill “Kleiner Berg” consisting of Hohburg quartz porphyry. During the glacial periods masses of ice several hundred metres thick pushed their way over the hill. The pieces of rock that were frozen into the ice scraped over the volcanic rocks under the ground and carved the striations visible today into the rocks. The giant inland glaciers of the glacial period originated in today’s Scandinavia. Additional details are contained in the geotope description of the glacial striations on Spielberg hill near Böhlitz.

During the Weichsel glacial period, 115,000 to 10,000 years ago, the inland glaciers advancing from the north no longer reached the area of the Geopark Porphyrland. Instead, vast treeless regions with permanently frozen subsoil expanded. Sand and dust blown around by high winds abraded and polished the stones (ventifacts) and rocks. The most well-known rock “processed” in this manner is the Naumann Heim Rock along the south-eastern slope of the Kleiner Berg. The grooves and small pits cut in the rock as impact marks run parallel to the direction of the wind.

Due to its geological significance, the wind and glacial striations geotope at the Kleiner Berg has been classified as a natural monument and possesses the title National Geotope. It was named after two significant geologists who had preoccupied themselves with the North German inland glaciations (glacial theory). The Saxon geologist Carl Friedrich Naumann (1797-1873) discovered the striations in the Hohburg hills in 1844 and described them as glacial striations. The Swiss glacial scientist Albert Heim (1849-1937) vehemently contested this opinion. Today there is no doubt about the question raised by the Freiberg geologist Bernhard von Cotta at the time: “Should the Nordic glaciers really have extended from the Scandinavian mountains to the hills of Wurzen? The thought gives me the chills.”

location
04808, Lossatal district Hohburg

coordinates
N 51° 24′ 16.3; E 12° 47′ 55.6 (WGS 84)
4555688; 5696949 (Gauß-Krüger)
346896; 5697108 (UTM 33)

contact
Gemeindeverwaltung Lossatal
Karl-Marx-Straße 14
04808 Lossatal, OT Falkenhain
Tel. 034262 4880
Internet: www.lossatal.eu

 

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Georoute Walking tour over the “Kleiner Berg” hill

Details der Windschliffe am Naumann-Heim-Felsen, Foto: T. Witzke

Close-up of the wind striations at the Naumann Heim Rocks, Photo: T. Witzke

Durch Winde abgeschliffener Stein, sogenannter Windkanter, Foto: J. Rascher

Stone eroded by wind, Photo: J. Rascher

Gletscherschliffe auf dem Kleinen Berg, Foto: J. Rascher

Glacial striations below the top of the small hill “Kleiner Berg”, Photo: J. Rascher

Porträt Carl Friedrich Naumann

Portrait of Carl Friedrich Naumann

Porträtaufnahme Albert Heim

Portrait of Albert Heim