Falkenhagen mountains
Landscape history of the inland dunes
Open inland dunes of Hotspot Hill (red line) and area
where sand has been removed (yellow line) Copyright: GeoBasis-DE/LGB (2021), dl-de/by-2-0, modified
Ice Age
relics
When the
glaciers retreated at the end of the Vistula glaciation, extensive sandy areas
remained at the edge of the glacier. In the last phase of the glacial period,
the younger tundra period, there was another cooling about 12,000 years ago.
The climate became drier. The fine-grained sand was carried away by westerly
winds and deposited elsewhere. This is how a dune area was created within
Falkensee, which stretches east of the Falkenhagener See, over the
Falkenhagener mountains to the Bredower forest over an area of about seven kilometers.
Use of
the forest
In the
Schmettauschen map series (1767-1787) the area of the Falkenhagener Berge bears the field designation
"Falckenhagensche Bauer Heyde". It is an indication of a presumably
intensive use of forest pastures by the farmers from Falkenhagen. Planned
afforestation with pine trees began in Brandenburg in the 18th century.
Use
through raw material mining
In the
1930s, the wooded dunes were opened up by man. The fine sands of the blown-up
dunes were ideal as building material. The sands were used as landfill for the
construction of the railway embankment between Berlin (Spandau) and Falkensee. The sand
was transported several kilometers through Falkensee by means of lorry trains. Two open
dunes were created in the Falkenhagen mountains as a result of the mining.
Military
use
The
highest elevation in the Falkenhagener mountains is the so-called spotlight
mountain. It has a
natural height of 50 meters above sea level. Using this natural height, an
anti-aircraft searchlight system was installed at the beginning of 1943. Since
then, the Berg has borne its popular name.
Living
space for life artists
Pioneer of the plant world One of
the first to arrive on the open sandy areas of the Falkenhagener Berge is the
sand sedge (Carex arenaria). It forms meter-long subterranean rungs. On the one
hand, it strengthens the sandy soil with its roots, on the other hand, it copes
well with renewed sand upheaval. "Cheetah" of the beetle world The dune
tiger beetle (Cicindela hybrida) is a very fast runner capable of catching
flies. In order to achieve an optimal operating temperature of 35 degrees
Celsius for its performance, it likes to stand in the sun. If it gets too hot
for him, he cools himself down by increasing the distance to the ground,
leaning on his long legs. The
artificially created open inland dunes in the Falkenhagener mountains are rare
extreme locations and biotopes protected under the Federal Nature Conservation
Act.
Headlamp Mountain, looking west Photo: Wiedemann Sand quarrying in the Falkenhagen mountains, 1938/1939 Photo: Archive, Museum and Gallery Falkensee Sand sedge (Carex arenaria) on the dune crest, 2019 Photo: Wiedemann