Fig. 8: Time-domain correlation between the 2-ANP-5-MA core and PLG core (Tethyan realm). | Communications Earth & Environment

Fig. 8: Time-domain correlation between the 2-ANP-5-MA core and PLG core (Tethyan realm).

From: New insights into the early opening of the Equatorial Atlantic Gateway revealed through a magneto-cyclostratigraphy framework from the Brazilian Equatorial Margin

Fig. 8

a Right: Lithostratigraphy of the 2-ANP-5-MA core, Time-domain GR profile and magnetic polarity obtained in this study. Left: Climate indicators7 expressing the change of the semi-arid conditions to humid conditions. The estimative of the onset of the cold snap ages from Leandro et al.22. b Simplified timescale showing magnetic polarity ages (this study and Ramos et al.18, planktonic foraminiferal, calcareous nannofossils zones and OAE 1a age22. M0r Chron is correlated with G. aptiensis planktonic foraminifera and C. litterarius calcareous nannofossil zones, and ISEA and “2” Subchrons are associated with G. algerianus planktonic foraminifera and NC6 (R. angustus) calcareous nannofossil zones. c Stages 1 and 2 – Schematic reconstruction of the Berriasian–Hauterivian interval, showing the location of the proto–Romanche Fracture Zone (RFZ), connecting the WARS (West African Rift System) and the CARS (Central African Rift System) to the future BEM. d Stage 3 – Schematic reconstruction of the Aptian interval (~117 Ma), showing the area of the BEM where the Codó Sea3,4 was established, with possible directions of marine entry (red arrows). e Stage 4 – Schematic reconstruction of the Albian interval, representing the time when the complete separation of the South American and African plates occurred. Schematic reconstructions based on kinematic models1,2,5,19. RFZ Romanche Fracture Zone, POT Potiguar Basin, SG Sergipe Basin, RTJ Recôncavo-Tucano-Jatobá Basins, AB Araripe Basin, PB Parnaiba Basin, SB São Francisco Basin.

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