Category Archives: eclogites

Eclogites: back to the surface

Eclogites are beautiful rocks that form deep within subduction zones. The vast majority of subducted oceanic crust becomes more dense than the surrounding mantle rocks and travels to the strange world of the deep earth. Lucky for us, small volumes … Continue reading

Categories: eclogites, metamorphism, subduction, tectonics

Oceanic crust – down to the core

Almost all of what I write about in this blog concerns only 1% of the earth’s volume. All crust, all sedimentary rocks, the glories of mountain building, all occupy an insignificant portion of the earth. It’s the only bit we … Continue reading

Categories: eclogites, metamorphism, subduction

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