| Popis: |
‘Hidden volcanoes’ highlights ancient volcanoes, which offer crucial perspectives that would not be clear from the study of modern volcanoes alone. Exhumed (uplifted and dissected) volcanoes provide vital glimpses deep inside a volcano, including how they work. They are windows showing what really happens when hot magma interacts with bedrock, ice-sheets, lakes, and deep oceans. Ancient volcanoes also reveal how volcanic processes vary with time. They have enabled us to discover new and awesome styles of eruption. Examples are described, from the highest mountain in Wales, Yr Wyddfa, or Snowdon, which was an explosive caldera volcano that emerged from shallow seas. Also described are ‘Large igneous provinces’, diamond-bearing volcanoes, and the most ancient volcanism on Earth. |
