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Geosite ID: M01PSL07 Name: Porta d’Abra Thematic category: Stratigraphy and Tectonics |
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Municipality: Machico Civil parish: Caniçal Location area: 0,1 -10 ha Coordinates(1):32°45'01.6'' N 16°41'42.3'' W Altitude: 47 m Accessibility: Moderate Distance to nearest paved road: 760 m Conditions of observation: Good (1) Coordinates of the geosite and / or the best viewpoint |
Brief description
Porta d’Abra geosite as weel as the entire surrounding region of Ponta de São Lourenço, is an excellent example of the close relationship between tectonic and volcanic structures and volcanic origin on Madeira Island.
Through the excellent exposure of numerous geological sections on the coastal cliffs, it is possible to understand the geometric and stratigraphic relationship between the various geological units and their internal structures. Thus, for example, it is possible to observe the erosive discordance between the Intermediate Volcanic Complex (CVM) and the Upper Volcanic Complex (CVS). Likewise, here you can observe the best examples of dykes exposed by differential marine erosion (in “cabo real”).
Relevant notes
Visiting a site of geological interest is the sole responsibility of the user.
The user must take precautions when visiting the site, taking into account the conditions of the terrain, weather conditions and other hazards, so that they do not create situations that put themselves or others at risk.
The user must respect private property. Access to private areas requires prior authorization from the owners.
The user must respect natural heritage, keeping it intact. The impact of your actions should be minimal.
Protection status
Natural spaces of very conditioned use – Scarp zone (Article 55º), according to the Municipal Master Plan.
ZPE of Ponta de São Lourenço that coincides with the limits of the ZEC of Ponta de São Lourenço, and Natural Park of Madeira (Decreto Regulamentar Regional n.º 3/2014/M, artigo 2.º, alínea c).
Geological map of Madeira Island detail, Sheet b - M01PSL07
Bibliography
BRUM DA SILVEIRA, A.; MADEIRA, J.; RAMALHO, R.; FONSECA, P., PRADA, S. (2010) - Notícia Explicativa da Carta Geológica da ilha da Madeira, na escala 1:50.000, folhas A e B. Edição da Secretaria Regional do Ambiente e Recursos Naturais, Região Autónoma da Madeira e Universidade da Madeira: 47 p. ISBN: 978-972-98405-2-4. (Editado em 2011).
BRUM DA SILVEIRA, A.; MADEIRA, J.; RAMALHO, R.; FONSECA, P.; RODRIGUES, C., PRADA, S. (2010) Carta Geológica da ilha da Madeira na escala 1:50.000 - Folha A e B. Edição da Região Autónoma da Madeira, Secretaria Regional do Ambiente e Recursos Naturais; ISBN: 978-972-98405-1-7 (Editado em 2011).
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 - Relatório Final, 414 p.
KLÜGEL, A.; SCHWARZ, S.; VAN DEN BOGAARD, P.; HOERNLE, K.A.; WOHLGEMUTH-UEBERWASSER, C.C. & KÖSTER J.J. (2009) Structure and evolution of the volcanic rift zone at Ponta de São Lourenço, eastern Madeira. Bull Volcanol 71: 671-685.
RAMALHO, R. (2004) – Cartografia Geológica da Madeira. Estratigrafia e Tectónica do Sector a Leste de Machico. Universidade de Lisboa. Faculdade de Ciências. 146 p.
RAMALHO, R.; MADEIRA, J.; FONSECA, P.E.; BRUM DA SILVEIRA, A.; PRADA, S.; RODRIGUES, C. F. (2005a) Tectónica da Ponta de São Lourenço, Ilha da Madeira. Cadernos Lab. XeolóXico de LaXe, Coruña. Vol. 30, pp. 223-234.
RAMALHO, R.; BRUM DA SILVEIRA, A.; MADEIRA, J.; FONSECA, P.E.; PRADA, S.; RODRIGUES, C. F. (2005b) Fracture pattern and structural control of Madeira Island Volcanism (Portugal). Volume de abstracts do International Workshop on Ocean Island Volcanism, Sal, Cabo Verde, 2 – 8 Abril 2005: p.33.
Photo gallery
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.