casiri is a mountainous complex in the barroso mountain range in the andes of peru, about high, and is located in the tacna region. casiri, also known as paucarani, is a volcano consisting of four individual volcanic edifices with lava domes; the southeasternmost edifice has been active during the holocene, producing thick lava flows that have overrun moraines of pleistocene age and the youngest of which has been dated to 2,600 ± 400 years ago. although no historical eruptions are known, the volcano is considered to be potentially active.