Using thermal remanent magnetisation (TRM) to distinguish block and ash flow and debris flow deposits, and to estimate their emplacement temperature: 1991-1995 lava dome eruption at Mt. Unzen Volcano, Japan

We demonstrate that TRM analysis, associated with field observations, can be a viable method for determining the emplacement temperature of hot BAF and cold DF deposits, characterised by similar componentry and sedimentological facies. This has implications for hazard assessment of older, dormant volcanic systems, to reconstruct the eruptive history.