Global Volcanism Program | Image GVP-00113
The headland of Cape Thera above Phira harbor. The light-brown, cliff-forming unit above the harbor is the Cape Thera Ignimbrite. Above the cliffs is a sequence of sloping pyroclastic deposits and paleosols, which underlies the prominent thinner dark-colored layer at the top of the photo. This is the Middle Pumice unit, a welded Plinian pumice-fall deposit erupted about 100,000 years ago and thought to originate from a vent west of Phira. The lower-angle slopes above it are lithic breccias of the Middle Pumice eruption.
Photo by Lee Siebert, 1994 (Smithsonian Institution).