File:Portas de Ródão - Portugal (24426908731).jpg
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Summary
[edit]DescriptionPortas de Ródão - Portugal (24426908731).jpg |
As Portas de Ródão são uma formação geológica situada perto de Vila Velha de Ródão, resultante da intersecção do duro relevo quartzítico da Serra das Talhadas com o curso do rio Tejo. Neste local há um estreitamento do vale, que aqui corre entre duas paredes escarpadas, que atingem cerca de 170 m de altura, fazendo lembrar duas "portas", uma a norte no distrito de Castelo Branco, Beira Baixa, e outra a sul no concelho de Nisa, distrito de Portalegre, Alto Alentejo. O encaixe do Tejo começou por erosão remontante, há cerca de 2,6 milhões de anos, aproveitando acidentes tectónicos associados à falha do Pônsul, e decorreu em várias etapas, reflectidas em terraços fluviais e plataformas embutidas por erosão, mais visíveis na margem direita a montante das Portas. O grande lago e as grandes profundidades imediatamente a jusante das Portas testemunham a imponência da queda de água que aqui terá existido antes de se atingir a actual fase de equilíbrio. No topo da "porta" norte, que é facilmente acessível por estrada, situa-se o pequeno castelo do Rei Wamba. Deste local vislumbra-se um vasto panorama sobre o vale do Tejo a jusante das Portas, com o Conhal do Arneiro, na margem esquerda, e o povoado paleolítico de Vila Ruivas, na margem direita. As Portas de Ródão são igualmente um local privilegiado de observação da avifauna, servindo de habitat à maior colónia de grifos de Portugal, assim como à cegonha-preta ou ao milhafre-real. É um dos geossítios do Geoparque Naturtejo da Meseta Meridional. <a href="https://pt.wikipedia.org/wiki/Monumento_Natural_das_Portas_de_Ródão" rel="nofollow">pt.wikipedia.org/wiki/Monumento_Natural_das_Portas_de_Ró...</a> |
Date | |
Source | Portas de Ródão - Portugal |
Author | Vitor Oliveira from Torres Vedras, PORTUGAL |
Camera location | 39° 38′ 24.62″ N, 7° 41′ 35.16″ W ![]() | View this and other nearby images on: OpenStreetMap | ![]() |
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This image was originally posted to Flickr by Portuguese_eyes at https://flickr.com/photos/21446942@N00/24426908731 (archive). It was reviewed on 15 May 2019 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-sa-2.0. |
15 May 2019
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 01:24, 15 May 2019 | ![]() | 3,888 × 2,251 (3.52 MB) | Tm (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Camera manufacturer | Canon |
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Camera model | Canon EOS 40D |
Exposure time | 1/1,250 sec (0.0008) |
F-number | f/5.6 |
ISO speed rating | 400 |
Date and time of data generation | 19:54, 20 January 2016 |
Lens focal length | 85 mm |
Horizontal resolution | 240 dpi |
Vertical resolution | 240 dpi |
Y and C positioning | Co-sited |
Pair of black and white reference values |
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Exif version | 2 |
Meaning of each component |
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Metering mode | Center weighted average |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
File source | 0 |
Scene type | 0 |