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What's a "perched syncline" ?
Let's start with the definition of a "syncline" (definition on Wikipedia) : In short, it is a geologic feature like a "V" fold in layered sedimentary ground, which often occurs when the layers tend to go horizontally, but twisted by the tectonic forces. In analogy, an "anticline" is the convex opposite form, where the sedimentary layers form a dome, and a "monocline" is flat (for instance, the Grand Canyon region is a large monocline dug by erosion).A "perched syncline", or "perched synclinal", differenciates itself by the fact it stands elevated from the surrounding terrain. Contrary to the monoclines, they form very characteristic mountains, looking like fortresses surrounded by walls.
Where are the perched synclinals ?
In all mountains made of sedimentary stones. In Europe, there are many in regions like the Provence Alps, in the Dolomites. In Africa, they are found in abundance in the Atlas. In the USA, they are countless in the many regions of canyons, and in South America, the tallest of them is the ... Aconcagua itself, despites it partly fails to the rule, not being made only of the same type of rock.This list-album aims to collect them all. Just add to it the mountains which correspond to the definition of perched synclinals ! I will add a photo every time a new is added.
The list
 Castillo Mayor, Spain |  Castillo de Acher, Spain |
 Mont Aiguille, France |  San Donato, Spain |
 Le Saoû, France |  Muráň, Slovakia |
 Le Granier, France |  Torrecilla, Italy |
 Piatra Craiuli, Romania |  Schneeberg, Austria |
 Sedlena Greda, Montenegro | [img:654386:aligncenter:medium:El Turbón, Spain] |
1 Areas & Ranges