The maars appear to form a lineament with Ch'iyar Qullu. However, in terms of Pb isotope ratios and geochemistry the eruption products of the maars bear no resemblance to these at Chiyar Qullu. Potassium-argon dating has yielded an age of less than 128,000 years ago on a lava bomb on Ñiq'i Quta.