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In geology an intra-arc basin is a sedimentary basin that exists amidst a volcanic arc. Being located next to volcanoes intra-arc basins tend to host Volcano-sedimentary sequences. Cura-Mallín at the border of Chile and Argentina is an example of an intra-arc basin.

Some Neoproterozoic clastic metasedimentary rocks in the Central Eastern Desert of Egypt (CED) derived from bimodal volcanic sources appear to have been deposited in arc-related basins, including interarc or back-arc basins, intra-arc basins, and retro-arc basin of active continental margin.[1]


  1. ^ El Bahariya, G,. (2018). Geology, geochemistry, and source characteristics of Neoproterozoic arc-related clastic metasediments, Central Eastern Desert, Egypt. Arabian Journal of Geosciences 11 (5), 87