Category Archives: metamorphism

Oceanic crust – that sinking feeling

Some rocks lead a quiet life. Stable parts of continental crust just sit there for billions of years, doing nothing. In the oceans things are much more dynamic. Live fast, die young, stay pretty is the motto of oceanic crust. … Continue reading

Categories: eclogites, metamorphism, subduction, tectonics

Eclogite: mysterious visitor from the deep

Fifty kilometres is not far. World-class marathon runners run 42km in a little over 2 hours. They only move along the earth’s surface though. Getting to 50 kilometres below your feet is a different thing entirely. It’s a  place of … Continue reading

Categories: eclogites, metamorphism, subduction, tectonics

The biggest pile of sand the world has ever seen

The Moine, a set of sedimentary rocks found in furthest north-west Scotland have enjoyed at least three cycles of metamorphism and deformation. My only sample from here is a migmatitic gneiss, so when I heard about people studying sedimentology in … Continue reading

Categories: metamorphism, Scotland, sediments

Channel flow – hot rocks, big glaciers and the world’s tallest mountains

Leonardo da Vinci, famed artist and Renaissance “Renaissance Man” made some interesting remarks about Geology. When he looked at rocks in the Alps containing fossil molluscs, it was clear to his trained eye that the fossils were near identical to … Continue reading

Categories: Himalaya, metamorphism, mountains, tectonics