Jarellón is a
caldera in the
Andes, on the border between
Bolivia and
Chile which was discovered in 1975.[1]
It has a diameter of 5 kilometres (3.1 mi) and formed during the
Pliocene, with one
K-Ar date of 3.6 ± 0.1 million years ago. It has erupted
dacite and
rhyolite. The caldera and the associated
stratovolcano of the same name are an important source of
obsidian, which forms several large lava flows. This obsidian is known as the Laguna Blanca obsidian or Zapaleri obsidian.[1] This obsidian was traded regionally.[2]
References
^
abSeelenfreund, Andrea; Pino, Mario; Glascock, Michael D.; Sinclaire, Carole; Miranda, Pedro; Pasten, Denisse; Cancino, Simón; Dinator, María Inés; Morales, José Roberto (March 2010). "Morphological and geochemical analysis of the Laguna Blanca/Zapaleri obsidian source in the Atacama Puna". Geoarchaeology. 25 (2): 245–263.
doi:
10.1002/gea.20306.