This set of photos concentrates on high pressure eclogites and some medium pressure corona gabbros in the Caledonides of western Norway. Most of these rocks have broadly basaltic compositions, and were metamorphosed during the Paleozoic Caledonian Orogeny. The high pressure rocks were brought rapidly enough to the surface so that some eclogites scarcely have any evidence of retrograde metamorphism.


Geology


Simplified geologic map of Norway, Sweden, and Finland. The photos below are from Norway, from the Trondheim area (locations 1 and 2) and regions to the southwest. The blue line was another field trip and has nothing to do with the photos below.


Tour between Trondheim, epidote amphibolite facies, southwest to eclogites


Ferry trip across a fjord.


Another lovely fjord.


Pillow lavas in Løkken. Notice that they are nearly upside-down.


Pillow lavas in Løkken, close-up of the rind of two adjacent pillows. The difference in appearance between the rind (dark) and pillow interiors (yellowish, left and right), is caused by pre-metamorphic chemical alteration of the glassy pillow surface.


Sulfide layer in mafic rocks at Løkken.


Close-up of the sulfides in the sulfide layer in mafic rocks at Løkken.


View of the coast of the island of Lepsøy.


Layers of gneiss and amphibolite.


Amphibolite boudins in gneisses.


Amphibolite layers in gneisses.


Amphibolite layers in gneisses, with some of the amphibolites having developed 'bookshelf' or 'domino' boudins.


View from Haramsøy to Lepsøy.


Field with eclogite boudins.


Layered cumulate section in a corona gabbro (Haram Gabbro).


Close-up of the corona textures in the corona gabbro.


Pyroxene-plagioclase pegmatite body in the corona gabbro.


Eclogite boudins.


Retrograded eclogite. The red things are garnets, green is augite-plagioclase symplectite, and black is hornblende.


Retrograded eclogite, showing off lichen.


Retrograded eclogite. The green symplectites are rather dull and grayish, compared to fresh omphacite.


Fresh orthopyroxene-bearing eclogite.


Eclogite boudin on the north shore of Flemsøy.


Fresh kyanite eclogite in the boudin shown above.


Fresh kyanite eclogite.


Partially retrograded kyanite eclogite.


Kyanite-garnet gneiss (reportedly containing rare microdiamonds, which attracted Barbie).