Teresa Ubide , Penny E Wieser , Olivier Bachmann , Guilherme Augusto Rosa Gualda , David Axford Neave , Pablo Samaniego, Adam Kent

Magma storage modulates the explosivity, frequency, and impact of volcanic eruptions, and controls the formation of magmatic-hydrothermal mineral deposits. The architecture of magma storage and plumbing systems, and their eruption triggering mechanisms, are inaccessible to direct observation in active volcanoes. However, they can be accessed through the study of products of volcanic eruptions: volcanic rocks and the crystal, melt, and gas records they contain. This chapter explores the texture and composition of volcanic rocks (and their plutonic cargoes) to better understand pre-eruptive magma storage and transfer from storage to eruption. We take a rock-centred approach to understanding magma-mush storage systems feeding volcanism, discussing traditional as well as new approaches, and their implications for volcano monitoring efforts.