Two contrasting styles of interaction between basic magmas and continental crust in the British Tertiary Volcanic Province

Some of the magmas that were extruded to form the 59 Ma, early, plateau‐forming, basalt‐dominated floods in the British Tertiary Volcanic Province mixed with small amounts of sialic melt during their uprise through the continental crust, while others underwent concomitant fractional crystallization and crustal assimilation. Magma batches of the first group originated in the uppermost asthenosphere and mostly ponded at the Moho, where they …