Category Archives: mountains

Sediment and sea: from the heights to the depths

This study in blues and greys and browns, this combination of fuzziness and sharp edges, where is it? It’s where land and ocean meet and mingle. A place where mud and silt and sand pause half way along an incredible … Continue reading

Categories: Great Geology in Google earth, Himalaya, mountains, 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

The Himalaya: mountains made from mountains

Good building stones get reused. Sometimes the only traces of very old buildings are their stones, built into more modern ones. It’s the same with rocks and mountain belts. Stone that now forms parts of the Himalaya was once part … Continue reading

Categories: geochemistry, Himalaya, metamorphism, mountains, open access, tectonics