Grand Filon, La Terrasse-sur-Dorlay, La Grand-Croix, Loire, Auvergne-Rhône-Alpes, France
|Latitude & Longitude (WGS84):||45° 26' 54'' North , 4° 35' 9'' East|
|Latitude & Longitude (decimal):||45.44833,4.58583|
|Köppen climate type:||Cfb : Temperate oceanic climate|
|Other/historical region names associated with this locality:||Rhône-Alpes|
Huge quartz vein (6 m in width, 1 km in length) located on the right bank of the Dorlay brook, above the school. It was mined for quartz during the 19th century and the ore was send to some glassworks of Rive-de-Gier. A large trench and one adit are still visible.
8 valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
443.8 - 541 Ma
|Cambrian-Ordovician sedimentary rocks|