ACKNOWLEDGMENTS
We thank R. Salas-Gismondi (MUSM) for allowing us to study this material under his care; C. Chacaltana Budiel (Instituto Nacional Geológico, Minero y Metalúrgico, Lima, Peru) for new data on the geology of the Bagua Basin; and M. D. Uhen, O. Lambert, and an anonymous reviewer for their comments on the manuscript.
ORCID
Pavel Gol’din http://orcid.org/0000-0001-6118-1384