Ignimbrite eruptions in the volcanic history of the glencoe Cauldron subsidence

The field relations and petrography of two thick ignimbrite horizons are described from the volcanic pile within the Glencoe Cauldron and are correlated with two pyroclastic horizons in the Lorne Plateau lavas. Their recognition enables two cycles in the volcanic history, culminating in cauldron‐subsidence and caldera formation to be discerned. The role of variation in gas pressure in depth is discussed in relation to the formation of the ring‐faults bounding the Cauldron‐Subsidence, and the volcanic history of the Glencoe Cauldron Subsidence reviewed.