Depression of Covão do Coelho
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Depression of Covão do Coelho
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Lisboa e Vale do Tejo
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Alcanena
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Serras de Aire e Candeeiros Nature Park
Identification and Access
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No
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Access to Covão do Coelho coming from:
- Alcanena (± 12 km) – N365, N243 and N360 to Nicho street in Minde following to Covão do Coelho.
- Porto de Mós (±21,5 km) – N243 and N360 to Minde/Covão do Coelho.
GPS: 39.533203, -8.666620
Base Characterization
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Near the polje of Minde, the karst depression of Covão do Coelho is interpreted as being an old blind valley, suspended above said Polje, where the direction of drainage was coupled with the slope of the layers to build the observed asymmetry. The valley, whose bottom is irregularly flattened and covered with terra rossa, ends against a rocky escarpment, where the old part of the village was. This depression has a set of sinkholes.
Similar to what happens in other places, this is another example of how geomorphologic structure reflects in local place names. Thus, the name Covão do Coelho (rabbit big pit) is directly related to the fact of being inserted into the depression. This area is occupied by many infrastructures, whether due to urban area or the proximity to the A1, which makes it difficult to interpret its origin and continuity.
Blind valley – a valley formed by a watercourse that ends suddenly on the point where the stream/river disappears underground.
Depression – landform sunken or depressed below the surrounding area.
Doline (also known as sinkhole) - a closed surface depression draining underground in karst landscape. Dolines are usually "bowl-shaped" and can have only a few or many hundreds of meters in diameter.
Karst - A distinctive topography that indicates dissolution of underlying soluble rocks by surface or ground water in areas of easily soluble rocks. Characterized by caves, underground drainage and sinkholes.
Polje – limestone relief form consisting of an elongated and long depression generally flat bottom. Often it has a very steep slope corresponding to a fault. In rainy periods it often becomes a temporary pond.
Terra rossa – Italian expression meaning “red soil”. The terra rossa soil is heavy and clay-rich (silty-clay to clayey) soil, strongly reddish, developed on limestone or dolomite.
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Unkown