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Advisor(s)
Abstract(s)
Santa Maria é a ilha mais antiga (cerca de 8 Ma) e mais Oriental do arquipélago dos Açores (Fig. 1), situada a cerca de 430 km a Leste da Crista Média Atlântica. A ilha apresenta duas áreas com morfologias distintas: a parte Ocidental é achatada e apresenta extensas plataformas que atingem altitudes de aproximadamente 250 m acima do nível do mar; a parte Oriental é muito irregular e atinge altitudes na ordem dos 450 m. A faixa costeira estende-se ao longo de um perímetro de cerca de 64 km, correspondente a aproximadamente 7,5 % da extensão do litoral açoriano. A tipologia costeira actual resulta da antiguidade da própria ilha e de várias submersões, responsáveis pela aglomeração de rochas sedimentares marinhas (e.g. conglomerados marinhos, calcarenitos fossilíferos e arenitos) em vertentes e arribas costeiras da ilha, dotando-a de um valor geológico particular e inexistente no restante arquipélago.
ABSTRACT: Santa Maria is the oldest and easternmost island of the Azores, located at 430 km east of the Mid-Atlantic Ridge (Fig. 1). This island has two distinct morphological areas: the western part is flat and exhibits extensive wave-cut platforms reaching altitudes of 250 m above sea level, while the eastern part is irregular, with the highest point over 450 m. The coastline is 64 km in length, approximately 7.5 % of the total Azorean coastal extent. The coastal typology results from the island’s antiquity and the fact that it has been frequently submerged. As a consequence, several agglomerations of marine sedimentary rocks occur (e.g. marine conglomerates, fossiliferous calcarenites and arenites) distributed through cliffs and headlands, providing a special geological value to this island that is not present elsewhere in the archipelago.
ABSTRACT: Santa Maria is the oldest and easternmost island of the Azores, located at 430 km east of the Mid-Atlantic Ridge (Fig. 1). This island has two distinct morphological areas: the western part is flat and exhibits extensive wave-cut platforms reaching altitudes of 250 m above sea level, while the eastern part is irregular, with the highest point over 450 m. The coastline is 64 km in length, approximately 7.5 % of the total Azorean coastal extent. The coastal typology results from the island’s antiquity and the fact that it has been frequently submerged. As a consequence, several agglomerations of marine sedimentary rocks occur (e.g. marine conglomerates, fossiliferous calcarenites and arenites) distributed through cliffs and headlands, providing a special geological value to this island that is not present elsewhere in the archipelago.
Description
Guias Costeiros dos Açores | Azores Coastal Guides.
Keywords
Flora Algal Marinha Açores Marine Algal Flora Azores
Citation
Neto, A.I., Wallenstein, F.M., Silva, T., Álvaro, N., Titley, I. (2008). "Santa Maria - Zona entre marés = Santa Maria : interdital". Secretaria Regional do Ambiente e do Mar & Câmara Municipal de Vila do Porto, Ponta Delgada, 39 p.. ISBN 978-972-99884-5-5; ISBN 978-989-95262-1-1. Edição Bilingue (Inglês).
Publisher
Secretaria Regional do Ambiente e do Mar & Câmara Municipal de Vila do Porto