| Als Bestimmungsmerkmal fallen zweifarbige Einsprenglinge (blaugrau und rosarot) auf, die allerdings auch in der Variante RP26 vorkommen. Das wichtigste Kriterium, um diese beiden Varianten auseinander halten zu können, sind die in der intrusiven Variante vorhandenen, schmalen Zonierungen, welche die ... moreAls Bestimmungsmerkmal fallen zweifarbige Einsprenglinge (blaugrau und rosarot) auf, die allerdings auch in der Variante RP26 vorkommen. Das wichtigste Kriterium, um diese beiden Varianten auseinander halten zu können, sind die in der intrusiven Variante vorhandenen, schmalen Zonierungen, welche die blaugrauen Kristalle dünn umschließen. Generell finden sich 2 Arten von Einsprenglingen in der intrusiven Variante: 1. kleine, zerbrochen wirkende rosarote und 2. größere, blaugraue mit schmaler Zonierung, welche die gleiche Farbe aufweist, wie die der Kleineren Einsprenglinge. ... Ein Beitrag von Jörg-Florian J. |
| The metal extraction by ore leaching (mostly copper) was about 1,000 years BC. known in the Mediterranean, but there are also barely no written records. The in the Middle Ages and in the following Renaissance well-known different procedures were first described in detail by Georg Agricola 1556 in hi ... moreThe metal extraction by ore leaching (mostly copper) was about 1,000 years BC. known in the Mediterranean, but there are also barely no written records. The in the Middle Ages and in the following Renaissance well-known different procedures were first described in detail by Georg Agricola 1556 in his book "De Re Metallica Libri XII". A contribution by Peter Seroka |
| Sulfur is known since ancient times. In the first Book of Moses (Genesis), part of the Pentateuch (Five Books of Moses completed, about 440 BC.), There is the story of Sodom and Gomorrah, which the Lord destroyed because of the vicious life of its inhabitants by fire and sulfur. This event will be a ... moreSulfur is known since ancient times. In the first Book of Moses (Genesis), part of the Pentateuch (Five Books of Moses completed, about 440 BC.), There is the story of Sodom and Gomorrah, which the Lord destroyed because of the vicious life of its inhabitants by fire and sulfur. This event will be about 4,500 years have taken place before our era. |