Dictionary of Geotourism

2020 Edition
| Editors: Anze Chen, Young Ng, Erkuang Zhang, Mingzhong Tian

Pyroclastic Rocks

Reference work entry
DOI: https://doi.org/10.1007/978-981-13-2538-0_1970

A pyroclastic rock is a rock that is formed by the consolidation of different types of transported and deposited clastic debris after a volcanic eruption. Pyroclastic materials include clastic rock debris, mineral crystal fragments and volcanic glass fragments. Another type of fragment comes from unconsolidated magmatic debris that are still in a molten slurry state before tearing and deposition induced by the explosion; these are called magma fragments (or plastic fragments). Tuff and ignimbrite are typical pyroclastic rocks in acidic volcanic areas.

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