Mineralienatlas (name for mineral atlas) is the platform for people interested in mineralogy, geology, palaeontology and mining since 2001. We operate a significant database for minerals, fossils, rocks and their localities. Mineralienatlas is not limited to a section. We bring together information and inform comprehensive.

To complete our information constantly, we need your support. With us, everyone can and should participate. Currently Mineralienatlas is used and expanded by 10433 members. Every month hundreds of thousands of visitors use our website as an information source.
 
Geolitho Foundation non-profit GmbH
Geolitho Foundation non-profit GmbH is the non-profit supporter of the Mineral Atlas (Mineralienatlas), the Lithotheque, the Geolitho Collection Management and the Marketplace and Store by collectors for collectors. The Foundation promotes public education in the field of mineralogy, geology, paleontology and mining by operating, maintaining and further expanding earth science projects.
 
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In der gängi­gen Lit­er­a­tur wird für das Felsen­meer ein Erz mit einem Hä­mati­tan­teil von bis zu 80 % angegeben, was hi­er seit dem 8. oder 9. Jahrhun­dert n. Chr. wirtschaftlich genutzt wurde, somit ist das Ge­bi­et derzeit der Äl­teste bekan­nte Ab­bau von Eisen­stein in West­falen. Die Ber­gleute be­di­en­ten sic ... moreIn der gängigen Literatur wird für das Felsenmeer ein Erz mit einem Hämatitanteil von bis zu 80 % angegeben, was hier seit dem 8. oder 9. Jahrhundert n. Chr. wirtschaftlich genutzt wurde, somit ist das Gebiet derzeit der Älteste bekannte Abbau von Eisenstein in Westfalen. Die Bergleute bedienten sich den natürlichen Hohlräumen, erweiterten sie und nutzten sie als Transportwege. Übertage zeugen auch heute noch Schachtöffnungen, Stollenmundlöcher und Halden vom damaligen Bergbaugeschehen.

Man kann sicherlich einen Gehalt von 70 Massenprozent Eisen als - fuer natuerlich vorkommende Erze unerreichbare - Obergrenze als gegeben ansehen. Dies beantwortet natuerlich nicht die Frage nach dem durchschnittlichen Eisengehalt des Hemeraner Erzes und ersetzt auch keine Analysen.

Man muss aber annehmen, dass die typische, ... Ein Beitrag von René Gervers und Wilhelm W.
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... Wenn die Körn­er plat­ten­för­mige (lam­i­nae) Ges­talt haben, so bezeich­net man diese Ag­gre­gate, je nach Größe, als schup­pig oder blät­trig (lamel­lar). Die in­di­vi­du­ellen Plat­ten sind im All­ge­mei­nen par­al­lel, kön­nen aber auch um ein ge­mein­sames Zen­trum ge­bo­gen sein und konzen­trische For­men bil­den. Wenn ... more... Wenn die Körner plattenförmige (laminae) Gestalt haben, so bezeichnet man diese Aggregate, je nach Größe, als schuppig oder blättrig (lamellar). Die individuellen Platten sind im Allgemeinen parallel, können aber auch um ein gemeinsames Zentrum gebogen sein und konzentrische Formen bilden. Wenn die Platten dünn und trennbar sind, bezeichnet man die Aggregate als blättrig oder schieferig. Wenn ein Mineral aus kleinen Schuppen besteht, wird es als glimmerartig bezeichnet. Beispiele: Calcit und Gips (rosettenartig), Glimmer (charakteristisch glimmerartig),Talk und manche Hämatitaggregate (schuppig) ... ein Beitrag von Perter Seroka
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Ear­ly be­fore Py­ro­mor­phite got its name, Py­ro­mor­phite was known as Grün-, Braun-, Bunt­bleierz or Po­lychrom. Best spec­i­men are known from Freiberg, Clausthal, Dorn­bach and Pri­bram adorned the former Min­er­als cabi­nets of Jo­hann Richter, Karl Pabst von Ohain, Chris­tian Lud­wig Stieglitz, Car­o­line Louise ... moreEarly before Pyromorphite got its name, Pyromorphite was known as Grün-, Braun-, Buntbleierz or Polychrom. Best specimen are known from Freiberg, Clausthal, Dornbach and Pribram adorned the former Minerals cabinets of Johann Richter, Karl Pabst von Ohain, Christian Ludwig Stieglitz, Caroline Louise of Baden, Johann Wolfgang von Goethe, Abraham Gottlob Werner, Ignaz von Born, Sigmund Zois and other prominent collectors of the 18th to early 19th century. The first chemical analysis undertook M. H. Klaproth in 1784; the name Pyromorphit, from the Greek "pyro" for fire and "Morpho" for form, was of J.F.L. Hausmann 1813 awarded. The reason for this peculiar ... An article by Peter Seroka in german language
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In­di­ca­tor stoneA Scandinavian indicator stone is a glacial erratic composed of a characteristic rock type derived from a small known source area in Scandinavia. This term not only applies to igneous and metamorphic rocks but also to some sedimentary rocks. The Jotnian Sandstone and most of the Palaeozoic limestones, and the Old Red Sandstone are not included in the definition, although the presence of these and other rocks provide some evidence about the source area(s) of erratics and should certainly not be neglected in a stone count. In all cases we recommend including the whole assemblage of erratics/stones in such account. This makes it possible to use several methods of Interpretation. However, it should be pointed out that the practise used in the past, whereby each researcher had her/his own method of interpreting stone counts, has proved to be unsatisfactory. We demonstrate on the bases of over 2000 counts of indicator stones that we have carried out on assemblages mostly from Lower Saxony and Schleswig-Holstein, but also from other N.German states and neighbouring countries, that the TGZ method (LÜTTIG 1958) yields the most reliable results. In addition to this method, the sources of individual indicator stones may be plotted on a so-called circle map and can be integrated with possible source data and the relative frequencies of other erratics in the assemblage. Some rock types are more suitable as indicator stones then others. It is unwise to use clearly unsuitable rock types; this would considerably reduce the reliability of the method and lead to erroneous results.
A Scan­di­na­vian in­di­ca­tor stone is a gla­cial er­rat­ic com­posed of a char­ac­teris­tic rock type de­rived from a small known source area in Scan­di­navia. This term not on­ly ap­plies to ig­neous and me­ta­mor­ph­ic rocks but al­so to some sed­i­men­tary rocks. The Jot­nian Sand­s­tone and most of the Palaeo­zoic lime­s­tone ... moreA Scandinavian indicator stone is a glacial erratic composed of a characteristic rock type derived from a small known source area in Scandinavia. This term not only applies to igneous and metamorphic rocks but also to some sedimentary rocks. The Jotnian Sandstone and most of the Palaeozoic limestones, and the Old Red Sandstone are not included in the definition, although the presence of these and other rocks provide some evidence about the source area(s) of erratics and should certainly not be neglected in a stone count. In all cases we recommend including the whole assemblage of erratics/stones in such account. This makes it possible to use several methods of Interpretation. However, it should be pointed out that the practise used in the past, whereby each researcher had her/his own method of interpreting stone counts, has proved to be unsatisfactory. We demonstrate on the bases of over 2000 counts of indicator stones that we have carried out on assemblages mostly from Lower Saxony and Schleswig-Holstein, but also from other N.German states and neighbouring countries, that the TGZ method (LÜTTIG 1958) yields the most reliable results. In addition to this method, the sources of individual indicator stones may be plotted on a so-called circle map and can be integrated with possible source data and the relative frequencies of other erratics in the assemblage. Some rock types are more suitable as indicator stones then others. It is unwise to use clearly unsuitable rock types; this would considerably reduce the reliability of the method and lead to erroneous results.
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„What will be the fate of my col­lec­tion once I will no longer be able to col­lect? There are spec­i­mens of unique beau­ty and ex­treme rar­i­ty in the col­lec­tion, pie­ces that can­not be re­placed since some lo­cal­i­ties are closed or have been oblit­er­at­ed. All this might be thrown away be­cause not many peo­ple ... more„What will be the fate of my collection once I will no longer be able to collect? There are specimens of unique beauty and extreme rarity in the collection, pieces that cannot be replaced since some localities are closed or have been obliterated. All this might be thrown away because not many people realise the value and importance hidden in these little unimpressive boxes”. Many micromounters are worried by these considerations and other factors. “My collection is an important part of my life and of my personality. If my collection dissapears, I too, will cease to exist without trace”. We, the Micromounters of the Münchener Mineralienfreunde, are no exception. Many times the future of our collections was subject of our discussions and conversations. Children and grand children are not always appreciative of their parents’ or grandparents’ passion.
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