Parques de Portugal

Galegos stream - Potholes

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On the granite bed of a stream are large cavities - potholes -, scoured out by the action of stones which, propelled by the water and agitated by currents, gradually wore down and dug out the stream bed. Also worth looking out for is the contact between the granite and the surrounding, older rock in the ditch alongside the road. This contact gave rise to a dense, black and very hard rock called hornfels (a metamorphic rock formed by the contact between shale and a hot igneous body, so it is a heat-altered equivalent of the original rock).

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  • On the granite bed of a stream are large cavities - potholes -, scoured out by the action of stones which, propelled by the water and agitated by currents, gradually wore down and dug out the stream bed. Also worth looking out for is the contact between the granite and the surrounding, older rock in the ditch alongside the road. This contact gave rise to a dense, black and very hard rock called hornfels (a metamorphic rock formed by the contact between shale and a hot igneous body, so it is a heat-altered equivalent of the original rock).

  • Alentejo

  • Marvão

  • Serra de S. Mamede Nature Park

  • No

  • Access to Galegos coming from:

    - Marvão (more or less 12 km) - N359, N246-1 and M1088.

    - Spain - La Fontañera (more or less 1 km); or by N-521 (more or less 4 km) – N246-1 and M1088.

     

    In Galegos cross the bridge over Server and cut to the left, the potholes are about 80 m to the left of the road, on the riverbanks.

  • Natural

  • Rural.

  • Public

  • In Galegos visit Melara Picado Nunes museum / press.