id	keyword
amq-597	et al
amq-597	tephra
amq-597	layers
amq-597	paterne
amq-597	pumice
amq-597	paterne et
amq-597	deposits
amq-597	composition
amq-597	chemical
amq-597	pyroclastic
amq-597	grey
amq-597	fragments
amq-597	sulpizio
amq-597	fields
amq-597	colour
amq-597	marine
amq-597	vesuvius
amq-597	sulpizio et
amq-597	phlegrean
amq-597	eruption
amq-597	fall
amq-597	tephra layers
amq-597	calanchi et