Figure 8
From: An updated reconstruction of basaltic crust emplacement in Tyrrhenian sea, Italy
The Ponza structural high. (a) Bathymetric map showing Latium-Campania offhore, the volcanic structural high of Palmarola Ponza and Zannone islands, and the adjacent sedimentary basins of Palmarola, Ventotene and Vavilov. Data48,49,50 and methods51,52,53,54 as in Fig. 1. (b) Line drawing and interpretation of seismic reflection profile TP6 across Palmarola basin; early Pliocene sediment is found at coring station n. 20. TP6 profile shows that Capo Circeo offshore and Palmarola basin have been submerged only shallowly until early Pliocene. Palmarola basin formation and calcalkaline rhyolitic volcanism from Ponza island started in early Pliocene (4.4 Ma). Legend. Seismic unit A – Plio-Quaternary sedimentary sequence divisible in: unit A1, sedimentary sequence from the mid-Pliocene to the present including seismic unit H; unit A2, sedimentary sequence including lower and middle Pliocene. Seismic unit C – acoustic substratum divisible in: unit C1, non reflective; unit C2, reflective. X: middle Pliocene unconformity; Z: top of the acoustic substratum (see text). (b, inspired by ref.34).
