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. 2012 Oct 5;2:712. doi: 10.1038/srep00712

Figure 1. The Campi Flegrei volcano, showing the location of vents of the studied eruptions.

Figure 1

Bold dashed lines: vent of Campanian Ignimbrite eruption presumed on the basis of geological evidence51, dotted line: Neapolitan Yellow Tuff caldera hypothesized on the basis of geophysical data52. Right: schematic chronogram of Campi Flegrei activity as recorded by stratigraphic successions. Bottom: plot of total alkalis vs. silica for Campi Flegrei studied rocks; symbols correspond to the vent locations on map.