Author Archives: Metageologist

Subduction is not the end

Subduction is just the beginning. Stuck on the surface of the earth as we are, it’s easy to think that when oceanic lithosphere is destroyed when it vanishes into the mantle. But this is wrong. The more we manage to peer … Continue reading

Categories: Deep earth, subduction

Paths across the Cheshire Peak

Driving west across the edge of the English Peak District is a good way to see how geology shapes landscape. Tracing the routes that cross it – feeling their shapes with a finger on a map or with your body as … Continue reading

Categories: England, landscape, sediments

A new paradigm for Barrovian metamorphism?

The phrase ‘new paradigm’ is a little shop-worn but it still catches the eye. To see it used in a “discussion and reply” on a dry-looking metamorphic petrology paper is really something unusual. Tracing through these articles really shows how … Continue reading

Categories: eclogites, metamorphism, mountains, Scotland, tectonics

Metamorphic petrology: under pressure and getting stressed?

High pressure (HP) terranes are areas containing eclogites and other eclogite-facies rocks found within many mountains belts, including the Himalaya and the Alps. HP rocks were metamorphosed at extreme pressures, up to 3 or even 4 billion Pascals (or GPa. Atmospheric … Continue reading

Categories: eclogites, metamorphism, mountains, subduction, tectonics