Page 146 - Caldera Volcanism Analysis, Modelling and Response

Case Study of the Abrigo Ignimbrite, Tenerife, Canary Islands 121

Figure 7 Field lithic clast analysis and sample location on outcrop at Locality 160, near San
Juan (includes legend of lithic clast abbreviations and numbers which is also used for Figures
7--12). Abbreviation: Lit. Cl., Lithic clast.

volcanic clasts (generally FV4WFV3EFV6WFV2WFV1 with some local excep-
tions, FV5, where present, is relatively common, see Table 2); o1–20% syenite
(S4WWS1WWS3, S2 is rare and not observed in sample counts, see Table 1);
and rare, dense, glassy volcanics, welded volcanics and non-welded clastic clasts.
Syeno-gabbroids and gabbroid clasts were not observed in the selected sample
boxes.
Major vertical lithic component variations were observed at both Poris de
Abona (Figure 10) and El Medano (Figure 8) across the Bandas del Sur. In general,
there is a greater variety of lithic types and a greater abundance of altered lithic