J. South Am. earth sci. J. South Am. earth sci. The sedimentological signature of impact spherules and its relation to ejecta transport mechanisms during the Chicxulub asteroid impact (Cretaceous/Paleogene boundary) Bermúdez H. D. Bolívar L. Arz J. A. Universidad de Zaragoza Arenillas I. Universidad de Zaragoza Gilabert V. DePalma R. Philips G. De Palma M. Bermúdez D. Gómez C. Cui Y. 2025 research-article