File:Portella de la Grava et Puig de la Grava.jpg
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Summary[edit]
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Français : La portella est un col situé à 2426 mètres d'altitude, à la tête de la vallée de la Têt (ci-dessous, à gauche). Le col se trouve sur la principale ligne de partage des eaux de la chaîne des Pyrénées. La rivière Têt rejoint la mer Méditerranée au nord de cette chaîne, à quelques kilomètres à l'est de Perpignan. Les cours d'eau situés de l'autre côté du col font partie du bassin versant de l'Èbre, qui rejoint la Méditerranée loin au sud des Pyrénées, au-delà de Tarragone.
Géologie : le puig de la Cometa d'Espagne, la portella et les terres situées à gauche de la portella qui s'élèvent jusqu'au Pic Carlit (2921 mètres), reposent sur des schistes et d'autres métasédiments cambriens ("Groupe de Jujols"). La montagne située immédiatement à droite de la portella (Puig de la Grava, 2671 mètres) repose sur du granit hercynien, et les montagnes situées à sa droite reposent sur le gneiss ordovicien du massif de l'Hospitalet. La zone de métasédiments cambriens et la zone de granit-gneiss sont séparées par la faille hercynienne est-ouest de l'Hospitalet-Lanós, qui s'étend approximativement de la portella au col de Puymorens et à Soldeu en Andorre. English: The Portella is a mountain pass at an altitude of 2426 metres, at the head of the Têt valley (below, left). The pass lies on the main watershed of the Pyrenees mountain chain. The River Têt reaches the Mediterranean Sea to the north of that chain, a few kilometres east of Perpignan. Watercourses on the far side of the pass form part of the catchment area of the River Ebro, which reaches the Mediterranean far to the south of the Pyrenees, beyond Tarragona. Geology: the Puig de la Cometa d'Espagne, the Portella, and the land on the left of the picture rising to Pic Carlit (2921 metres), are underlain by Cambrian schists and other metasediments ("Group de Jujols"). The mountain immediately to the right of the Portella (Puig de la Grava, 2671 metres) is on Hercynian granite, and mountains to the right of that are on the Ordovician gneiss of the Hospitalet massif. The zone of Cambrian metasediments and the granite-gneiss zone are separated by the east-west Hercynian Hospitalet- Lanós fault, which runs approximately from the Portella, to the col de Puymorens, and to Soldeu in Andorra. |
| Date | |
| Source | Own work |
| Author | Alan Mattingly |
| Camera location |  | View this and other nearby images on: OpenStreetMap |  |
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| current | 11:59, 12 November 2023 | | 4,608 × 3,456 (6.38 MB) | Alan Mattingly (talk | contribs) | Uploaded own work with UploadWizard |
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