The Greifensteine is a rock tower in the Ore Mountains,

Germany Germany, officially the Federal Republic of Germany (FRG),, is a country in Central Europe. It is the most populous member state of the European Union. Germany lies between the Baltic and North Sea to the north and the Alps to the sou ...

, between the towns of Geyer, Ehrenfriedersdorf and Jahnsbach. The highest of the seven

granite Granite () is a coarse-grained ( phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, and plagioclase. It forms from magma with a high content of silica and alkali metal oxides that slowly cools and solidifies und ...

rocks reaches 731 m. Another six rock towers were demolished by quarrying, which ended in 1923.

Geology

Geologically, the Greifensteine is the top of a

pluton In geology, an igneous intrusion (or intrusive body or simply intrusion) is a body of intrusive igneous rock that forms by crystallization of magma slowly cooling below the surface of the Earth. Intrusions have a wide variety of forms and com ...

. During the

Variscan orogeny The Variscan or Hercynian orogeny was a geologic mountain-building event caused by Late Paleozoic continental collision between Euramerica (Laurussia) and Gondwana to form the supercontinent of Pangaea. Nomenclature The name ''Variscan'', comes ...

magma Magma () is the molten or semi-molten natural material from which all igneous rocks are formed. Magma is found beneath the surface of the Earth, and evidence of magmatism has also been discovered on other terrestrial planets and some natura ...

intruded along structural zones, but cooled and solidified before reaching the earth surface. When the Erzgebirge block raised, the resulting granite formation raised with it. The surrounding softer material eroded and the harder granite remained, creating the

tors Tors may refer to: * Tor (rock formation), rock outcrops * Ivan Tors (1916–1983), playwright, screenwriter and film and television producer * TransOral Robotic Surgery, a surgical technique See also

* Tor (disambiguation) * Ten Tors * Tors ...

of the rock formation. The deposition of

ore Ore is natural rock or sediment that contains one or more valuable minerals, typically containing metals, that can be mined, treated and sold at a profit.Encyclopædia Britannica. "Ore". Encyclopædia Britannica Online. Retrieved 7 April ...

s associated with the intrusion gave the area its name (Erzgebirge, literally ''ore mountains'').

Mineral finds

Due to the productiveness of its ore deposits, the Greifensteine are also a well-known site of many different

mineral In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. ...

s and their varieties. As of 2014, a total of around 50 minerals and 10 varieties have been discovered here, including ''inter alia'' the well-known minerals

andalusite Andalusite is an aluminium nesosilicate mineral with the chemical formula Al2SiO5. This mineral was called andalousite by Delamétehrie, who thought it came from Andalusia, Spain. It soon became clear that it was a locality error, and that the spe ...

beryl Beryl ( ) is a mineral composed of beryllium aluminium silicate with the chemical formula Be3Al2Si6O18. Well-known varieties of beryl include emerald and aquamarine. Naturally occurring, hexagonal crystals of beryl can be up to several ...

gypsum Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate, with the chemical formula . It is widely mined and is used as a fertilizer and as the main constituent in many forms of plaster, blackboard or sidewalk chalk, and dr ...

haematite Hematite (), also spelled as haematite, is a common iron oxide compound with the formula, Fe2O3 and is widely found in rocks and soils. Hematite crystals belong to the rhombohedral lattice system which is designated the alpha polymorph of . ...

muscovite Muscovite (also known as common mica, isinglass, or potash mica) is a hydrated phyllosilicate mineral of aluminium and potassium with formula K Al2(Al Si3 O10)( F,O H)2, or ( KF)2( Al2O3)3( SiO2)6( H2O). It has a highly perfect basal cleavage ...

sphalerite Sphalerite (sometimes spelled sphaelerite) is a sulfide mineral with the chemical formula . It is the most important ore of zinc. Sphalerite is found in a variety of deposit types, but it is primarily in sedimentary exhalative, Mississippi-Va ...

pyrite The mineral pyrite (), or iron pyrite, also known as fool's gold, is an iron sulfide with the chemical formula Fe S2 (iron (II) disulfide). Pyrite is the most abundant sulfide mineral. Pyrite's metallic luster and pale brass-yellow hue giv ...

topaz Topaz is a silicate mineral of aluminium and fluorine with the chemical formula Al Si O( F, OH). It is used as a gemstone in jewelry and other adornments. Common topaz in its natural state is colorless, though trace element impurities can ma ...

wavellite Wavellite is an aluminium basic phosphate mineral with formula Al3( P O4)2(O H, F)3·5 H2O. Distinct crystals are rare, and it normally occurs as translucent green radial or spherical clusters. Discovery and occurrence Wavellite was firs ...

and

zircon Zircon () is a mineral belonging to the group of nesosilicates and is a source of the metal zirconium. Its chemical name is zirconium(IV) silicate, and its corresponding chemical formula is Zr SiO4. An empirical formula showing some of th ...

, as well as various

garnet Garnets () are a group of silicate minerals that have been used since the Bronze Age as gemstones and abrasives. All species of garnets possess similar physical properties and crystal forms, but differ in chemical composition. The different ...

tourmaline Tourmaline ( ) is a crystalline silicate mineral group in which boron is compounded with elements such as aluminium, iron, magnesium, sodium, lithium, or potassium. Tourmaline is a gemstone and can be found in a wide variety of colors. ...

s, (dravite, elbaite, schorl) and

wolframite Wolframite is an iron, manganese, and tungstate mineral with a chemical formula of that is the intermediate between ferberite ( rich) and hübnerite ( rich). Along with scheelite, the wolframite series are the most important tungsten ore miner ...

s. There are also rare minerals such as childrenite and natrodufrénite, as well as the radioactive minerals autunite and

torbernite Torbernite is a radioactive, hydrated green copper uranyl phosphate mineral, found in granites and other uranium-bearing deposits as a secondary mineral. Its name derives from the Swedish chemist Torbern Bergman (1735–1784), It is also known a ...

. The Greifensteine is also a

type locality Type locality may refer to: * Type locality (biology) * Type locality (geology) See also * Local (disambiguation) * Locality (disambiguation) {{disambiguation ...

for the following minerals:

fluorapatite Fluorapatite, often with the alternate spelling of fluoroapatite, is a phosphate mineral with the formula Ca5(PO4)3F (calcium fluorophosphate). Fluorapatite is a hard crystalline solid. Although samples can have various color (green, brown, b ...

greifensteinite Greifensteinite is beryllium phosphate mineral with formula: Ca2Fe2+5Be4(PO4)6(OH)4·6H2O. It is the Fe2+ dominant member of the roscherite group. It crystallizes in the monoclinic crystal system and typically forms prismatic dark olive green ...

, lacroixite and roscherite.Typlokalität Greifenstein Rocks, Ehrenfriedersdorf, Erzgebirge, Saxony, Germany
Mindat

History

The first indications of a settlement on the Greifensteine are from around 1180, and in 1349 the von Waldenburg family are

seignory In English law, seignory or seigniory, spelled ''signiory'' in Early Modern English (; french: seigneur, lit=lord; la, senior, lit=elder), is the lordship (authority) remaining to a grantor after the grant of an estate in fee simple. '' Nulle ter ...

to the "Grifenstein" castle. The castle is documented in 1372 as "Slosz Cryfenstein". The castle was destroyed in the 14th century by fire, and was rebuilt afterwards. It was abandoned in the 15th century, the area was used as 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 ...

and all traces of the former castle are removed. Of the originally 13 rock towers, six have been demolished and used for their granite over the years. This activity was stopped in 1928, and the area has become a

nature reserve A nature reserve (also known as a wildlife refuge, wildlife sanctuary, biosphere reserve or bioreserve, natural or nature preserve, or nature conservation area) is a protected area of importance for flora, fauna, or features of geological or ...

Tourism

Today, the Greifensteine is a

and a popular tourist attraction. The areal has a restaurant, a small museum and an outdoor theater that uses the rock towers as a dramatic backdrop. Stairs lead up to the tallest rock, which offers a nice view of the surrounding Erzgebirge. There are several rock climbing paths. In the surrounding area are the Greifenbachstauweiher and the Röhrgraben.

Stülpner-Höhle

Karl Stülpner (1762–1842), a local renegade and folk hero (the ''

Robin Hood Robin Hood is a legendary heroic outlaw originally depicted in English folklore and subsequently featured in literature and film. According to legend, he was a highly skilled archer and swordsman. In some versions of the legend, he is de ...

of the Erzgebirge'') had a hiding place in one of the numerous caverns of the Greifensteine area. This ''Stülpner-Höhle'' (engl.: Stülpner's cavern) can still be visited today.

References

{{Authority control Rock formations of Saxony Mountains of the Ore Mountains Ehrenfriedersdorf Geological type localities