Table 3. Textural parameters.

Phenocrysts							crystal growth time
Formation	units	bulk vesicularity	n. of crystals	Intercept (mm−4)	Slope (mm−1)	Lmax (mm)	time1 years	time2 years
Campanian Ignimbrite	basal fallout	0.8	≪ 100	-	-	1.1	-	17–174
Campanian Ignimbrite	upper flow	0.8	989	4.66	−2.79	1.5	11–114	24–238
Neapolitan Yellow Tuff	lowe member	0.7	≪ 100	-	-	1	-	16–159
Agnano Monte Spina	basal fallout	0.8	≪ 100	-	-	2	-	32–317
Pomici Principali	basal fallout	0.7	≪ 100	-	-	1	-	16–159
Astroni	basal fallout	0.7	28	2.52	−3	4	10–106	63–634
Minopoli	scoria	0.7	49	5.52	−4.3	1	8–78	16–159
Baia	basal fallout	0.7	184	4.02	−4.09	1.2	8–78	19–190
Averno	basal fallout	0.8	≪ 100	-	-	1	-	16–159
Nisida	scoria flow	0.5	251	12	−7.61	1.5	4–42	24–238
S. Teresa	scoria flow	0.7	79	5.26	−5.41	0.6	6–59	9–95
Monte Nuovo	scoria flow	0.5	318	8.42	−7.86	0.5	4–40	8–79
Monte Olibano	lava dome	0.5	849	7.32	−3.71	3	8–85	48–476

time 1 is calculated using crystal growth rate and CSD slopes, time 2 is calculated using crystal growth rate and the maximum measured length of crystals (Lmax), crystal growth rate range for phenocrysts: 10⁻⁹-10⁻¹⁰ mm/s (feldspar). crystal growth rate range for microlite: 1.39×10⁻⁷ to 1.65×10⁻⁶ mm/s (feldspar).