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Geology Photo page
The Massif Central in central France is known for its volcanic activity. When lava flows cool slowly, they can crystallize. In Bort-les-Orgues (Limousin) pillars of meters long Phonolite occurs. Phonolite is (between mafic and felsic) volcanic rock containing predominantly potassium Feldspar, and more than10% Nepheline. This rock occurs in areas with alkali-rich volcanism. Because of its location in a river valley, these formations have not been lost through erosion.
Photographed in: Bort-les-Orgues, France
By Erik Sanderson (zoekozoeko)
Fossiel.net number: 739-0001
The goal of this Geology Photo page is to present an overview of geological structures from all over the world. Anybody who wants to contribute by improving the information or adding images is welcome to do so! Either contact the Fossiel.net Team or use the Input Form.