Pomerape

Template:Infobox mountain Pomerape is a stratovolcano lying on the border of northern Chile and Bolivia (Oruro Department, Sajama Province, Curahuara de Carangas Municipality).<ref>Map of Curahuara de Carangas Municipality and population data. Template:Webarchive</ref> It is part of the Payachata complex of volcanoes, together with Parinacota Volcano to the south. The name "Payachata" means "twins" and refers to their appearance.<ref>Template:Cite book</ref> It hosts glaciers down to elevations of Template:Convert, lower on the northern slope.<ref>Template:Cite journal</ref>

Pomerape is a complex of lava domes, accompanied by lava flows which were emplaced atop of the domes.<ref>Template:Cite book</ref> It was active about 200,000 years ago.<ref>Template:Cite book</ref> The lava domes formed first and were later buried by the actual volcanic cone, which unlike the rhyolitic-dacitic domes is formed by hornblende andesite.<ref>Template:Cite journal</ref> The "Chungará Andesites" and lava dome complex of Parinacota were laid down at this time.<ref>Template:Cite journal</ref> Pomerape is associated with an adventive vent that has erupted mafic magmas. The main cone was last active 106,000 +- 7,000 years ago,<ref>Template:Cite journal</ref> the adventive vent is dated to 205,000 ± 24,000 years ago.<ref>Template:Cite book</ref>

Climbing the volcano is alpine grade PD by the east ridge.<ref>Template:Cite book</ref> Harder routes exist on the south face, sometimes on 50+ degree snow/rubble slope. For these routes a camp can be established at Template:Convert at the saddle between Parinacota and Pomerape. Depending on the season, the main difficulty can be penitentes (tall ice-blade needles), which make the ascent physically difficult or impossible.

See also

• List of volcanoes in Bolivia

References

• Template:Cite gvp (includes Pomerape)

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