Corral de Coquena is a volcanic spatter rampart in the Andes,[2] over the Tropic of Capricorn.
[4]: 554 The basement beneath Corral de Coquena is slightly higher than the general Pacana caldera floor.
[2] Other estimates indicate that Pampa Chamaca overlies the Corral de Coquena deposits,[4]: 563 an as yet unsettled question.
[3]: 813 The rampart is formed by glassy rhyolite,[2] or dacite,[1] typical of the potassium-rich calc-alkaline series of the Central Volcanic Zone.
[3]: 814 In the Pliocene, destruction of a lava dome resulted in the formation of a pyroclastic deposit around Corral de Coquena.
[3]: 813 A later layer of reworked Atana and Corral de Coquena pyroclastics extends 2–3 kilometres (1.2–1.9 mi) away.
[3]: 816 This is an unusual mode of activity for silicic magmas but also documented at Huaynaputina and the Cerro Chascon-Runtu Jarita complex.