A dyke is also known as a rock wall and is a lamellar sheet of rock formed by the intrusion of magma into a rock fracture. Dykes usually cross-cut the rock strata or are oblique to them. Dykes are generally from dozens of centimetres to dozens of metres wide and from dozens of metres to kilometres long. Dykes can form alone or in groups, whereas the dykes in a group are called dyke swarms. Dykes often form as either radial or concentric swarms. Due to differential weathering, they often stand out from the surrounding rocks. Different types of dykes or rock walls can be found in many geoparks.
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(2020). Dyke. In: Chen, A., Ng, Y., Zhang, E., Tian, M. (eds) Dictionary of Geotourism. Springer, Singapore. https://doi.org/10.1007/978-981-13-2538-0_563
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DOI: https://doi.org/10.1007/978-981-13-2538-0_563
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