Halleberg
From Wikipedia, the free encyclopedia
| Halleberg | |
|---|---|
 Halleberg seen from the main road to Vargön from the east | |
| Highest point | |
| Elevation | 155 metres (509 ft) |
| Prominence | 155 metres (509 ft) |
| Coordinates | 58°23′N 12°27′E / 58.383°N 12.450°E |
| Naming | |
| Language of name | Swedish |
| Geography | |
 | |
Halleberg is a table mountain by lake Vänern in Vänersborg Municipality, Västergötland, Sweden.
Halleberg, part of which protrudes into Lake Vänern is separated in the south by about 500 m (1,600 ft) wide valley from the adjacent Hunneberg (also a table mountain). The northern part of Halleberg called Hallesnipen.
Hallberg has an average height of about 90 m (300 ft) above lake Vänern, or 134 ft (41 m) above sea level; the highest point is 155 m (509 ft) above sea level.
Halleberg consists of Cambrian, Ordovician and Permian rocks. The Palaeozoic rocks are deposited directly on the crystalline peneplain bedrock, which in this range consists of göta granite. The Cambrian sedimentary rocks are sandstone and alum shale. The sandstone layer is on average 24 m (79 ft) thick. Above this there is then a 0.3 m (0.98 ft) thick slate which in turn is covered by about 24 m (79 ft) of alum shale. The Ordovician is represented by a calcareous slate. During the Permian diabase pushed between the still present and since eroded Ordovician layers, which lay as a protective cover over the softer sedimentary layers under it and thus protected the mountain from erosion. The diabase on Västgötabergen is known locally for staircases.
Economic Geology
Anthraconite, alum shale and diabase has previously been mined in several places on the mountain.
Nature
Around the foot of the Halleberg are elongated scree of large stacked, sharp-edged boulders. In a few places, there are so-called steps, where there are roads or paths up the mountain. The vegetation on the mountain plateau is dominated by spruce and pine, and the expanse of bog, while on scree lower parts are more species. In contrast to Hunneberg, on Halleberg there is simply lake Hallsjön, three-kilometer long but narrow.
On Halleberg is the Ecopark Halle-Hunneberg (comprising the Halle- och Hunnebergs platåers naturreservat and the Halle- och Hunnebergs branters naturreservat).
