Rain porphyry

Rain porphyry is an obsolete term for a local granite porphyry with pseudomorphs after cordierite . The name is derived from the place Regen in the Upper Palatinate and was introduced in 1868 by Carl Wilhelm von Gümbel .

It describes porphyries with a dense, spatulate, greyish-white to yellowish base mass, which contain numerous sprinkles of quartz, feldspar, mica and mostly also pinite (= pseudomorphoses) and give the rock a granitic appearance.

Individual evidence

↑ RW Le Maitre (Ed.): Igneous Rocks. A Classification and Glossary of Terms. Recommendations of the International Union of Geological Sciences Subcommission on the Systematics of Igneous Rocks. 2nd ed. Cambridge University Press, Cambridge / New York / Melbourne 2002, ISBN 0-521-66215-X .
^ Carl Wilhelm von Gümbel: Geognostic description of the Kingdom of Bavaria. Section 2: Geognostic description of the East Bavarian border mountains or the Bavarian and Upper Palatinate Forest Mountains. Justus Perthes, Gotha 1868, pp. 420 ff. ( MDZ reader ).

[1] RW Le Maitre (Ed.): Igneous Rocks. A Classification and Glossary of Terms. Recommendations of the International Union of Geological Sciences Subcommission on the Systematics of Igneous Rocks. 2nd ed. Cambridge University Press, Cambridge / New York / Melbourne 2002, ISBN 0-521-66215-X .

[2] Carl Wilhelm von Gümbel: Geognostic description of the Kingdom of Bavaria. Section 2: Geognostic description of the East Bavarian border mountains or the Bavarian and Upper Palatinate Forest Mountains. Justus Perthes, Gotha 1868, pp. 420 ff. ( MDZ reader ).