Geological Society of America, 2010, p. 7: obsidian: quispi capa, quispi rumi Teofilo Laime Ajacopa, Diccionario Bilingüe Iskay simipi yuyayk'ancha, La Paz, 2007 (Quechua-Spanish dictionary) "the one with obsidian", hispanicized spelling Esperumiyoc) is a mountain in the Cusco Region in Peru, about 4600 meters high.