| Calcite is one of the most abundant natural minerals. It is found in very different shapes, both compact as limestone as well as sinter in caves and in the crystalline state. But even in our daily life calcite is always present: in some regions it blockes water pipes as "chalk", we build our houses ... moreCalcite is one of the most abundant natural minerals. It is found in very different shapes, both compact as limestone as well as sinter in caves and in the crystalline state. But even in our daily life calcite is always present: in some regions it blockes water pipes as "chalk", we build our houses with it, it is in our food chain and without it we could not stand upright. Calcite is not rare, but the varied mineral on Earth. The variety of forms and variations of the forms of calcite are unmatched in the world of mineralogy. By 2009, more than 800 Calcit forms have been described. |
| Das Mineral Epidot ist vom griechischen Wort "epidosis" abgeleitet, was "Zunahme" oder "Zugabe" bedeutet. Die Deutung als "Zunahme" spielt möglicherweise auf die stengelig zunehmende Kristallform des Minerals an. Die Interpretation als "Zugabe" könnte auf die Tatsache zurückzuführen sein, dass es de ... moreDas Mineral Epidot ist vom griechischen Wort "epidosis" abgeleitet, was "Zunahme" oder "Zugabe" bedeutet. Die Deutung als "Zunahme" spielt möglicherweise auf die stengelig zunehmende Kristallform des Minerals an. Die Interpretation als "Zugabe" könnte auf die Tatsache zurückzuführen sein, dass es dem französischen Mineralogen René HAÜY erstmals im Jahre 1801 gelang, die beiden Silikate Turmalin und Epidot eindeutig auseinanderzuhalten und somit den Epidot als eigenständiges Mineral neben Turmalin stellte... Ein Beitrag von Peter Seroka |
| ... Over time, rocks weather due to the influence of wind, water, ice, and daily and seasonal temperature differences. These weathering products form then short the pedosphere (the ground), go into solution in water (chemistry), are transported as dust, and similar processes. Long term, but they rea ... more... Over time, rocks weather due to the influence of wind, water, ice, and daily and seasonal temperature differences. These weathering products form then short the pedosphere (the ground), go into solution in water (chemistry), are transported as dust, and similar processes. Long term, but they rearrange stable, lithify and form sedimentary rocks, are transported into the deep, and after transformation (metamorphosis) reveal pushed back ... An article by Peter Seroka, written in German |
| The village and the mine with the same name "Rosia Montana" are located approximately 85 km north of the city of Deva. The mine complex extends over 21.2 square kilometers and is one of the largest gold deposits in Europe. The tunnel system in the underground is several hundred kilometers long and w ... moreThe village and the mine with the same name "Rosia Montana" are located approximately 85 km north of the city of Deva. The mine complex extends over 21.2 square kilometers and is one of the largest gold deposits in Europe. The tunnel system in the underground is several hundred kilometers long and was used until a few years ago. Already in Roman times the tunnels had a length of 145 km. |