Volcanic rocks in Lower Jurassic marine carbonate successions in the southeastern Iberian Range (Spain): biochronostratigraphic dating

Dating volcanic materials through biochronostratigraphic methods applied to hosting strata (example from the Iberian Chain, eastern Spain)

“…The ammonite zonation of the Aalenian and Bajocian stages reproduces the biochronostratigraphic scheme figured by Fernández-López [1985] and Fernández-López [2016, 2019] for the Mediterranean-Caucasian Subrealm. Data showing the relative ages of the 13 volcanic levels as revealed in Cortés [2018Cortés [ , 2020Cortés [ , 2021. Absolute ages for the boundaries of the ammonite zones are obtained from Gradstein et al [2012].…”

“…Puga et al [2004] argued that Jurassic basalts and traquibasalts are drawn from fissural volcanism favored by a WSW-ENE trending deepfaulting system. Volcanic levels are detected from about the Pliensbachian in both the Iberian and Betic basins [Vera et al, 2004, Puga et al, 2011, Cortés, 2020. By contrast, they no longer occur from the early Bajocian (late Laeviuscula Zone or Laeviuscula-Propinquans zonal boundary) in the Iberian carbonate-platform system [Cortés, 2018[Cortés, , 2021, whereas their presence lasted until the Santonian in the Betic Basin [Molina et al, 1998, Molina andVera, 2008].…”

“…Based on the biostratigraphic dating carried out by Cortés [2018Cortés [ , 2020Cortés [ , 2021, Figure 13 shows the spatial distribution of the subaqueous emission centers that change along time. The volcanism mostly focused on the Teruel Fault Zone during the Early and earliest Middle Jurassic, being sporadically recorded towards the Caudiel Fault Zone, such as the volcanic episodes V 3 , V 4 , and V 11 (Figure 13).…”