Category Archives: metamorphism

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

A world without subduction

The greatest achievement of the generation of Earth Scientists now retiring is the concept of plate tectonics. The insight that the earth’s surface is made up of rigid plates that move has shed light on all aspects of Earth Science, … Continue reading

Categories: eclogites, impacts, metamorphism, 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

The South Mayo Trough: tiny grains record huge events

Sedimentary basins have been described as ‘tape recorders’ that preserve evidence of past events. Some sedimentary basins contain ‘recordings’ of grand tectonic events – plate collisions and mountain building. The information is stored as subtle but compelling patterns in the … Continue reading

Categories: Ireland, metamorphism, sediments, tectonics