Noruega meridional: día 2 (Drammer - Haugesund).
near Drammen, Buskerud fylke (Norge)
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Trail photos
On our 2nd day in Norway, we will cross the southern part of the country (Drammer - Haugesund). The surprising geology of the country, is eclipsed by the beauty of its landscapes in constant change. Both aspects are intimately related and I will try to show them. For millions of years, the Baltic Plate (where the Scandinavian countries are located) has been formed on the basis of ancient clashes between continents. At present, for just one million years, the erosion of the last glaciacines has exposed these materials, showing them great and almost unique.
Waypoints
1.- Salida desde de Drammen (Hotel Scandic Ambassadeur).
Departure from Drammen (Hotel Scandic Ambassadeur). Geological map of Drammen. The city sits on a volcanic zone, of very fluid lavas like those of Iceland (orange color), which emerged from the interior of the earth during the Permian (between 300-250 million years ago). The bluish coloration are andesites; also volcanic but more viscous and explosive lavas. The area is part of the so-called "Oslo Graben" or Oslo Rift, because of its resemblance to the current African Rift. It was produced by distensive phenomena at the end of the so-called Hercynian Orogeny. Source: Norwegian Geological Service. http://geo.ngu.no/kart/berggrunn/
4.- Entrada a Mjodalen.
Entrance to Mjodalen. The area between Mjodalen-Hokksun (green coloration on the map), are Ordovician Filitas (about 500 million years old). They were formed in the bottoms of an ancient ocean (Iapetus) and were displaced to the mainland by the Caledonian Orogeny. They are rocks with many minerals very suitable for agriculture.
8.- Canteras de Kongsberg.
Qods of granodioritic Gneiss. It was formed during the Swedish-Norwegian Orogeny (about 1000 million years ago). They are used as constution material. It is a traditional mining area for the last three centuries. Geological map of Kongsberg. In orange Granodioritic Gneiss (1000 Ma). In red, Gabros rich in precious metals of the same period
9.- Canteras de Kongsberg.
Kongsberg Quarries with clear Gneiss (Granodioritic Gneiss). (Source: GEONORGE Norwegian Geological Service). http://www.norgeskart.no/geoportal/#!?zoom=11&lon=194493.38&lat=6625948.42&wms=http://geo.ngu.no/mapserver/GeologiskarvWMS&_ga=2.236528513.162984269.1534418815-1238988785.1534418815&project=geonorge&layers=1002
10.- Coniferas Heia (próxima a Notodden).
The rosacea zone of Heia, in the vicinity of Notodden, are granites formed in the Swedish-Norwegian Orogeny (1000 Ma ago). They are hard rocks and poor in minerals. Therefore, they are unfit for agriculture and are covered by the typical forests of Norway (Firs pine and birch).
28.1 .- Cascadas de Langfoss: jardín de rocas.
Fustrated magmatism in the Akra Fjord. The areas of intense red (Gabros); those of light red (porphyritic granites) and even the pink zones (tonalites), are magmatic-plutonic rocks that have not been able to rise to the surface in the form of a volcano.
30.- Los Nappes de Haugalandet.
The Nappes of Haugalandet (in front of the Vatsvatnet lake). The Nappes (plates) of Haugalandet, to the right of the lake, are very old granites (red tones) that literally ride on the backs of the arenicas (yellow) and Filitas (green) much more modern. All move to the left of the image. They have traveled more than 50 km during the last 400 Ma
35.- Haugesund: una isla volcánica Caledoniana.
400 Ma ago, a volcanic island collided with the ancient Norwegian coasts (Baltic Shield). Its magmatic chamber now emerges as the foundation of the beautiful city (reddish colors). For Norwegian geologists, the most precious thing is located outside the town (rosacea band). They are Ophiolites, very rare rocks that are found in the deep mantle and seldom come to the surface.
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