The Waldenecksee or Petersee is a

quarry A quarry is a type of open-pit mining, open-pit mine in which dimension stone, rock (geology), rock, construction aggregate, riprap, sand, gravel, or slate is excavated from the ground. The operation of quarries is regulated in some juri ...

lake on the western edge of the

Northern Black Forest The Northern Black Forest () refers to the northern third of the Black Forest in Germany or, less commonly today, to the northern half of this mountain region. Geography The Northern Black Forest is bounded in the north by a line from Karlsruh ...

. It lies in an

exclave An enclave is a territory that is entirely surrounded by the territory of only one other state or entity. An enclave can be an independent territory or part of a larger one. Enclaves may also exist within territorial waters. ''Enclave'' is s ...

of the municipality of Sinzheim, surrounded by

Baden-Baden Baden-Baden () is a spa town in the states of Germany, state of Baden-Württemberg, south-western Germany, at the north-western border of the Black Forest mountain range on the small river Oos (river), Oos, ten kilometres (six miles) east of the ...

, between Iberg and

Fremersberg The Fremersberg is a hill, , on the western edge of the northern Black Forest in south Germany on the territory of the town of Baden-Baden and the municipality of Sinzheim. On the summit plateau, which is made of bunter sandstone there is the resi ...

on the western side of the hill of Waldeneck. Around 1900 a quarry was established here that was worked until 1968. After that a lake formed on the floor of the quarry, about 200 metres long and 35–75 metres wide.Gemeinde Sinzheim
Waldenecksee
retrieved 1 November 2013 One of its common names, the Petersee, is derived from the name of the former quarry owners, the Peter Porphyry Gravel Works (''Porphyr-Schotterwerk Peter''). Today it is leased as an angling lake and bathing is forbidden.

Ecology

Because water could not circulate in the lake as it is fed by springs and surface water, and because of nutrients introduced by plant growth and bathers, there was a risk of life in the lake dying out. This could only be prevented in summer 2013 by the intervention of the fire service who enriched the lake water by spraying it with oxygen. Thereafter the leaseholders of the lake, Sinzheim Sports Fishing Club, with financial support from the municipality of Sinzheim 2014, installed a solar-powered

circulator pump A circulator pump or circulating pump is a specific type of pump used to circulate gases, liquids, or Slurry, slurries in a closed circuit with small elevation changes. They are commonly found circulating water in a Hydronics, hydronic heating or ...

, which pumps water from the lakebed to the surface.

Geology

Quartz porphyry Quartz-porphyry, in layman's terms, is a type of volcanic (igneous) rock containing large porphyritic crystals of quartz. These rocks are classified as ''hemi-crystalline acid rocks''. Structure The quartz crystals exist in a fine-grained matrix ...

of the upper

Rotliegendes The Rotliegend, Rotliegend Group or Rotliegendes () is a lithostratigraphic unit (a sequence of rock strata) of latest Carboniferous to Guadalupian (middle Permian) age that is found in the subsurface of large areas in western and central Europe. T ...

is visible on the rock walls of the quarry. They are

ignimbrite Ignimbrite is a type of volcanic rock, consisting of hardened tuff. Ignimbrites form from the deposits of pyroclastic flows, which are a hot suspension of particles and gases flowing rapidly from a volcano, driven by being denser than the surrou ...

rhyolite Rhyolite ( ) is the most silica-rich of volcanic rocks. It is generally glassy or fine-grained (aphanitic) in texture (geology), texture, but may be porphyritic, containing larger mineral crystals (phenocrysts) in an otherwise fine-grained matri ...

s, that is,

pyroclast Tephra is fragmental material produced by a Volcano, volcanic eruption regardless of composition, fragment size, or emplacement mechanism. Volcanologists also refer to airborne fragments as pyroclasts. Once clasts have fallen to the ground, ...

ic volcanic rocks which have not flowed out as lava and cooled. but are formed from fluid suspensions of small magmatic particles in highly heated gases. Three of

lava field A lava field, sometimes called a lava bed, is a large, mostly flat area of lava flows. Such features are generally composed of highly fluid basalt lava, and can extend for tens or hundreds of kilometers across the underlying terrain. Morp ...

s of ignimbrite of different colours and mineral composition are recognizable from bottom to top.Rudolf Metz: ''Mineralogisch-landeskundliche Wanderungen im Nordschwarzwald, besonders in dessen alten Bergbaurevieren.'' 2nd, fully revised edition, Schauenburg, Lahr, 1977, , pp. 560 ff. The rocks are lithostratigraphically part of the Lichtental Formation, which is composed of remains of a volcano that is almost 300 million years old. The Baden-Württemberg State Office for Geology, Raw Materials and Mining (''Landesamt für Geologie, Rohstoffe und Bergbau Baden-Württemberg'') classifies the abandoned Waldeneck Quarry as a valuable

geotope A geotope is the geological component of the abiotic matrix present in an ecotope. Example geotopes might be an exposed outcrop of rocks, an erratic boulder, a grotto or ravine, a cave, an old stone wall marking a property boundary, and so forth. ...

Film location

The terrain of the quarry and lake, which is about 2 kilometres from the Baden-Baden broadcasting studio of

Südwestrundfunk (; ), shortened to SWR (), is a regional public broadcasting corporation serving the southwest of Germany, specifically the federal states of Baden-Württemberg and Rhineland-Palatinate. The corporation has main offices in three cities: Stuttg ...

is repeated used as a film location. For example, in 1984 in the four-part historical series, ', where it represented Hell Valley, in several episodes of the TV crime series ''

Tatort ("Crime Scene") is a German-language police procedural television series that has been running continuously since 1970 with 30 feature-length episodes per year, making it the longest-running German TV drama. Developed by the German public-se ...

'' and in 2010 as the scene of the showdown in the thriller, ''

The Good Neighbour (The) Good Neighbour or (The) Good Neighbor may refer to: Film and theatre * ''Good Neighbor'' (1941 Broadway production), at the Windsor Theatre, New York City * ''Good Neighbor'' (2001 film), a 2001 American film * ''The Good Neighbour'' (fi ...

''.cf. scene from ''Unter Nachbarn'' a
kurhausproduction.de/nachbarn
(with

Maxim Mehmet Maxim Mehmet (born 2 July 1975) is a German actor. He inherited his surname from his Crimean Tatar grandfather. He lived with his spouse in Berlin before he moved to Vienna. Selected filmography * '' NVA'' (2005) * ' (2008) * '' The Red Baron ...

and

Charly Hübner Carsten Johannes Marcus Hübner (born 4 December 1972 in Neustrelitz) is a German actor. He appeared in more than eighty films since 2003, including ''Magical Mystery or: The Return of Karl Schmidt'' (in 2017) and The Good Neighbour (''Unter Nach ...

in the boat on the Waldenecksee)

References

External links

{{Commons category Lakes of Baden-Württemberg Lakes of the Black Forest Rastatt (district) Quarries in Germany