Geosite ID: F02
Name: Praia Formosa
Civil parish: São Martinho
Location area: 0,1 -10 ha
Altitude: 10 m
Distance to nearest paved road:0 m
Conditions of observation: good(1) Coordinates of the geosite and / or the best viewpoint
On the Praia Formosa geosite there are several volcanic sequences that make up the Funchal Formation (Upper Volcanic Complex). In general, the following sucession is observed (from bottom to top): 1- basaltic pyroclastic deposits, with bombs and red lapilli layers, from a monogenetic subaerial cone formed by strombolian-type eruptive activity; 2- Black pyroclastic deposits of basaltic lapilli from nearby subaerial cones (eg Pico da Cruz and Pico do Funcho); 3- grey basaltic pyroclastic deposits from a surtseyan-type hydrovolcanic cone with multiple impact structures produced by lithic blocks and fragments that were projected with a ballistic trajectory, accretionary lapilli layers and well stratified ash layers associated with basal pyroclastic flows; 4- pyroclastic deposits of hydrovolcanic origin, composed of yellow tuff, (and tuffite) with layers of weathered trachytic pumice, related to hydroplinian-type distal eruptions; 5- Subaerial ’a’a-type basaltic flows sequences, sometimes interspersed with lapilli deposits; 6- tuff of hydrovolcanic origin, yellow in colour with weathered trachytic pumice layers related to hydroplinian-type distal eruptions. For its integrity and representativeness, this site should be used as a reference in defining the simple stratotype of the Funchal Formation.
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How to Cite
BRUM DA SILVEIRA, A.; PRADA, S.; RAMALHO, R.; MADEIRA, J.; FONSECA, P.; CANHA, E.; BRILHA, J. (2012). Inventariação do Património Geológico da Ilha da Madeira. Secretaria Regional do Ambiente e Recursos Naturais - Relatório Final, 414 p. In: https://geodiversidade.