The overall magma temperatures ranged for the andesitic and dacitic magmas and in the basaltic andesite. The magmas became cooler over time, with the post-collapse magmas being colder than the pre-collapse eruptive products. Variations in temperature between the outside and the inside of phenocrysts suggest that the magma chamber of Ollagüe was occasionally reheated by fresh magmas. Water contents of the main edifice magmas range 3-5% by weight; in the Ch'aska Urqu and La Celosa magmas the water content is less well determined, but is comparable to that of the main edifice magmas. Later research, however, has raised questions about the reliability of the method used to determine water content in magma, which may have been lower than 3-5%.