Tracers of uplift and subsidence in the Cape Verde Archipelago electronic supplement Ramalho*, R.; Helffrich, G.; Schmidt, D.; Vance, D. Department of Earth Sciences, University of Bristol, Wills Memorial Building Bristol, BS8 1RJ, UK *Corresponding author:
[email protected]. 1 Introduction This an electronic supplement of the paper ”Tracers of uplift and subsidence in the Cape Verde Archipelago”. The objective of this supplement is to provide more detailed information on the volcanostratigraphy of some of the Cape Verde islands mentioned in the main text, and a detailed description of key palaeo-markers of relative sea-level height used to track the history of vertical movements affecting those islands. 2 Palaeo-markers of sea-level in the Cape Verde islands 2.1 Sal Sal’s volcanostratigraphy comprises (Silva et al. 1990; Torres et al. 2002a): Ancient Eruptive Complex; Principal Eruptive Formation; Ponta do Altar-Baleia Complex; Conglomerate Brec- 1 cia; Ribeira da Fragata Formation; Serra Negra Eruptive Formation; Monte Grande-Pedra Lume Formation; and Quaternary Sediments (see Figure S1, and Table 1 in the main text). 2.1.1 The Ancient Eruptive Complex The Ancient Eruptive Complex constitutes the basement unit and is profoundly eroded and weathered. It occurs mainly in the central part of the island where it reaches the maximum elevation of ∼ 60 m asl. Silva et al. (1990) and Torres et al. (2002b) describe the Ancient Eruptive Complex as a complex sequence of formations mostly comprising hydrovolcanic prod- ucts of effusive and explosive nature. The whole unit is intensively intruded by dykes - up to 95% of the outcropping area - and small plutonic bodies, a condition that in conjunction with the advanced state of weathering exhibited by its products is an obstacle for solid event reconstructions.