1. William C. Mahaney, Leslie J Keiser, Dave Krinsley, Allen West et al. (2013). New Evidence from a Black Mat Site in the Northern Andes Supporting a Cosmic Impact 12,800 Years Ago // The Journal of Geology 121(4):309-325.
2. Acevado R.D., Rocca M.C.L., Ponce J.F., Stinco S.G. (2015). Impact Craters in South America // Springer Verlag.

Спутниковая фотография из Google Earth.

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