Pu'u ka 'akepa, Kilauea Volcano

Pu'u ka 'akepa - John Seach
East Rift Zone - Kilauea Volcano

Pu'u ka 'akepa is a littoral cone which erupted in 1790.
The ratio of lava to water increased during the eruption, leading to coarser tephra near the summit of the cone.