Experimental Constraints on the Rheology of Lavas From 2021 Cumbre Vieja Eruption (La Palma, Spain)

The 2021 Tajogaite eruption of Cumbre Vieja (La Palma, Spain) was typified by the emission low viscosity lavas that flowed at high velocities and inundated a large area. We experimentally investigated rheological evolution melt feeding through concentric cylinder viscometry to understand exceptional flowing ability these constrain its emplacement dynamics. conducted set cooling deformation experiments different rates (from 0.1 10 °C/min), isothermal subliquidus dwell temperatures between 1225 1175°C. All were shear rate s?1. Results show disequilibrium crystallization timescale fundamentally control melt, resulting in response crystal-bearing magmatic suspension. Integrating data with field observations allows us shed light on mechanisms govern flowability lavas.