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![Eclogite bedrock at Ådnefjellet.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/meland_21.jpg?itok=W8PmuPzd)
Eldsfjellet
The eclogites in western Norway were formed when Precambrian basement rocks were squeezed and pressed down under great pressure deep under the Caledonian mountain chain. The process may well have triggered some of the deepest earthquakes the world has ever known. The clearest traces of this drama are found in and around Mt. Eldsfjellet, in peaceful Meland.
![Bronze keys and remains of a wooden stick from Døso.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/kvh_234-1_b.jpg?itok=EoET9UiR)
![Varghola](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/kvh_235-_x.jpg?itok=oGVCMzhh)
![Hetlefloten i Os](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/723.jpg?itok=iwhgEn9w)
![Geologist William Helland-Hansen examining a quartz conglomerate in the Ulven Syncline on one of the hills by the north west end of Lake Ulvenvatnet.](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/232/os_31.jpg?itok=kdZe21Du)
Ulven
In the region of Ulven phyllite occurs with Hordaland's youngest fossils, and a beautiful quartz conglomerate. The phyllite and conglomerate got squeezed into the bottom of an ancient oceanic crust, made of gabbro and greenstone, in the heart of the Caledonide mountain chain.
![From](https://www.grind.no/sites/default/files/styles/medium/public/bilder/sted/190/nvh_312_vaksinen_ulven_150.jpg?itok=P4DdHVu-)