Lava Dome - John Seach
A spiny (Pelean) lava dome is steep-sided,
circular in cross section and have smooth upper surfaces.
The dome has tall vertical spines.
It is caused by the eruption of viscous magma over a vent.
Examples of Spiny Lava Domes
Mt Pelee (1902, 1932-22), Santiaguito
Spiny lava dome
Copyright John Seach