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Geosite ID: PSt08 Name: Ilhéu de Cima - Pedra do Sol Thematic category: Vulcanology and Paleontology |
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Municipality: Porto Santo Civil parish: Porto Santo Location area: 0.1-10 ha Coordinates(1):33°03'17.31'' N 16°17'13.99'' W Altitude: 0 m Accessibility: Difficult Distance to nearest paved road: 2,1 nmi Conditions of observation: Good (1) Coordinates of the geosite and / or the best viewpoint |
Brief description
In this islet one can observe submarine basaltic flows, layers of marine fossiliferous limestone, contemporary with the pre-emergence phase of the island, during the middle Miocene, as well as subaerial basaltic flows. The islet top is covered by Quaternary aeolianitic deposits. In the submarine flows of the SW slopes, it is possible to observe a mega pillow lava that can is cross-sectioned and shows a radial prismatic disjunction structure. It is also possible to observe fossilized reefs of coral colonies, concentrations of fossilized calcareous algae (rhodoliths) and echinoids (Clypeaster). Like the other islets, it was once connected to the main island.
Relevant notes
The visitation to the islanders requires prior authorization from the Institute of Forests and Nature Conservation (IFCN).
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
Natura 2000 Network, Network of Marine Protected Areas of Porto Santo, Site of Community Importance PTPOR0001 - Ilhéus do Porto Santo, Scientific Heritage (geological) and Natural Areas of Interdiction, according to the Municipal Master Plan.
Simplified geological map of Porto Santo Island detail - PSt08
Bibliography
FERREIRA, M. R. (2014). Património Geológico da Ilha do Porto Santo e Ilhéus Adjacentes (Madeira): Inventariação, Avaliação e Valorização como Contributo para a Geoconservação. Dissertação de Mestrado em Vulcanologia e Riscos Geológicos. Departamento de Geociências da Universidade dos Açores.
RIBEIRO, M. L. Carta Geológica Simplificada das Ilhas da Madeira e do Porto Santo, na escala 1:80.000 in RIBEIRO, M. L. & RAMALHO, M. (2009). Uma visita geológica ao Arquipélago da Madeira, Principais locais Geo-turísticos. Edição da Direção Regional do Comércio, Indústria e Energia e do Laboratório Nacional de Energia e Geologia, I. P, pp. 55, 82. ISBN: 978-989-96202-0-9.
SANTOS, A., MAYORAL, E., DA SILVA, C. M., CACHÃO, M., JOHNSON, M. E., BAARLI, B.G. (2011). Miocene intertidal zonation on a volcanically active shoreline: Porto Santo in the Madeira Archipelago, Portugal. Lethaia 44, pp. 26-32.
SANTOS, A., MAYORAL, E., BAARLI, B. G., DA SILVA, C. M., CACHÃO, M., JOHNSON, M. E. (2012a). Symbiotic association of a pyrgomatid barnacle with a coral from a volcanic middle Miocene shoreline (Porto Santo, Madeira Archipelago, Portugal). Palaeontology Vol. 55, Part 1, pp. 173-182.
SANTOS, A., MAYORAL, E., JOHNSON, M. E., BAARLI, B. G., CACHÃO, M., DA SILVA, C. M., LEDESMA-VÁSQUEZ, J. (2012b). Extreme habitat adaptation by boring bivalves on volcanically active paleoshores from North Atlantic Macaronesia. Facies 58, pp. 325-338.
SANTOS, A., MAYORAL, E., JOHNSON, M. E., BAARLI, B. G., DA SILVA, C. M., CACHÃO, M, LEDESMA-VÁZQUEZ, J. (2012). Basalt mounds and adjacent depressions attract contrasting biofacies on a volcanically active Middle Miocene coastline (Porto Santo, Madeira Archipelago, Portugal). Facies 58, pp. 573-585.
Photo gallery
How to Cite
FERREIRA, M. R. (2014). Património Geológico da Ilha do Porto Santo e Ilhéus Adjacentes (Madeira): Inventariação, Avaliação e Valorização como Contributo para a Geoconservação. Dissertação de Mestrado em Vulcanologia e Riscos Geológicos. Departamento de Geociências da Universidade dos Açores. In: https://geodiversidade.