Felsite is an extrusive acidic hypabyssal rock. It consists of microcrystals and crystallites formed by devitrification or recrystallization that appear as spherical granular structures in radial arrays. When a felsite contains feldspar porphyry, it is called felsophyre.
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(2020). Felsite. 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_694
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