Aguas Calientes is older than Lascar, and it might share a magma chamber. Miocene–Quaternary volcanic centres in the neighbourhood include Cerro Negro in the north, Acamarachi northeast, Tumisa southwest, and the Cordon de Puntas Negras in the south, which Lascar is sometimes considered to be part of.
Aguas Calientes predates Lascar and may share a magma chamber. Nearby volcanic formations from the Miocene to Quaternary periods include Cerro Negro in the north, Acamarachi northeast, Tumisa southwest, and the Cordon de Puntas Negras in the south; sometimes Lascar is considered part of this area.