Abstract
THE Andean Mountain system in Peru has experienced extensive igneous activity, a significant portion of which was intrusive. A principal feature of this part of the Andes is the coastal batholith, which extends approximately 1,800 km parallel to the coast1 and has been assigned a post-Lower Cretaceous pre-Oligocene intrusive age, with some preference for the Upper Cretaceous2.
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References
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GILETTI, B., DAY, H. Potassium–Argon Ages of Igneous Intrusive Rocks in Peru. Nature 220, 570–572 (1968). https://doi.org/10.1038/220570a0
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DOI: https://doi.org/10.1038/220570a0
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