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| Pico Viejo | |
|---|---|
| Name | Pico Viejo |
| Elevation m | 3135 |
| Prominence m | 170 |
| Location | Tenerife, Canary Islands, Spain |
| Range | Cañadas del Teide |
| Type | Stratovolcano / caldera rim |
| Last eruption | 1798 |
Pico Viejo is a prominent volcanic peak on the island of Tenerife in the Canary Islands, lying on the rim of the Las Cañadas caldera near Mount Teide and within Teide National Park. The volcano forms a large, youthful crater and contributes to the dramatic skyline of Tenerife together with neighboring summits such as Mount Pico del Teide and Roque Cinchado. Pico Viejo is a focus of geological research, conservation management, and recreational activities that intersect with regional transport and tourism infrastructure including TF-21 road and the Teide cable car.
Pico Viejo occupies a position on the southern rim of the Las Cañadas caldera, a major topographic feature formed by collapse associated with Mount Teide and earlier volcanic centers like Guajara and Montaña Blanca. The summit reaches roughly 3,135 metres above sea level and overlooks features such as the Boca de Tauce and the Cañadas floor, bounded by landmarks including Roques de García, Las Cañadas del Teide National Park, and the municipality of La Orotava. The volcanic cone contains a deep, steep-walled crater with internal terraces and secondary vents; nearby geomorphological elements include lava fields that extend toward coastal regions like Puerto de la Cruz and Los Cristianos and valleys draining to the Orotava Valley and Guía de Isora.
Pico Viejo is composed primarily of phonolitic and trachytic lavas, with mineral assemblages similar to those observed at Mount Teide and other Canarian centers such as Garachico and Teno Massif. The edifice sits within the Canary hotspot province and records magmatic processes related to plume-related basaltic to differentiated silica-undersaturated melts studied in comparison with systems like Hawaii and Iceland. Petrological studies link Pico Viejo activity to fractional crystallization, magma mixing, and crustal assimilation comparable to processes documented at Santorini and Vesuvius. Structural controls include radial and ring faults associated with caldera collapse analogous to features on La Palma and El Hierro. Geophysical monitoring at Pico Viejo integrates data from the Instituto Volcanológico de Canarias, seismic networks, GPS stations, and gas-emission measurements similar to protocols at Mt. Etna and Stromboli.
The eruptive history includes multiple explosive and effusive phases spanning the late Pleistocene to the Holocene, with the last documented eruption occurring in 1798 producing lava flows and tephra deposits that altered slopes toward the southwest and deposited layers correlated with regional chronologies from Montaña de las Arenas to Arafo. Earlier eruptions produced voluminous pyroclastic deposits and trachytic domes analogous to eruptive products at Santorini and Puyehue. Tephrostratigraphic correlations link Pico Viejo events to ash layers found in archaeological contexts in Granadilla de Abona and sedimentary records near La Laguna. Historical chroniclers from Santa Cruz de Tenerife and travelers such as Alexander von Humboldt and later naturalists documented fumarolic activity and landscape change, while modern radiometric dating using methods developed following studies at sites like Kīlauea and Mount St. Helens has refined the chronology.
At high elevations Pico Viejo lies within montane and alpine climatic zones that support specialized biota similar to subalpine communities found in Picos de Europa and Sierra Nevada (Spain). Vegetation on the caldera rim includes endemic taxa such as Echium wildpretii and members of the Laurel forest relict assemblages occurring downslope toward zones occupied by Pinus canariensis and Sideritis (mountain tea). The area is important for endemic invertebrates and bird species documented in inventories alongside fauna from Teide National Park and species lists used by organizations such as SEO/BirdLife and the IUCN. Climate at Pico Viejo is characterized by strong diurnal range, frequent wind exposure from the trade winds interacting with orographic lift as seen across Canary Islands summits, occasional snowfall in winter comparable to conditions on Mount Teide, and microclimates that affect soil development and colonization documented in studies paralleling alpine ecology on Madeira.
The summit and caldera region have long been significant to the indigenous Guanches and later to Spanish colonial authorities; archaeological sites on Tenerife include burial sites, petroglyphs, and terraces comparable to finds around Teide and Anaga Rural Park. Pico Viejo features in local folklore, religious processions, and modern cultural narratives promoted by municipal authorities in La Orotava and Vilaflor. Scientific expeditions from institutions such as the Spanish National Research Council and international collaborations from universities in Madrid, Oxford, and Berlin have conducted fieldwork here, while the site figures in conservation policy discussions involving UNESCO due to Teide National Park's World Heritage status and management frameworks similar to those applied at Picos de Europa National Park.
Pico Viejo is accessible via hiking routes that connect with trails leading to Mount Teide summit paths, the Chinyero trail network, and refuges used by mountaineers and naturalists. Visitor management is coordinated with entities such as the Parque Nacional del Teide administration and local tourism offices in Santa Cruz de Tenerife and Adeje, with infrastructure including refuge cabins, marked trails, and viewpoints akin to facilities around Roque de los Muchachos. Activities include trekking, geology-guided tours, birdwatching promoted by SEO/BirdLife, and educational programs run by the Instituto Canario de Ciencias Marinas and university extension services. Safety and environmental protections follow regulations similar to those enforced at Doñana National Park and involve limits on access during adverse weather and volcanic alerts issued by the Instituto Geográfico Nacional.
Category:Volcanoes of Tenerife Category:Teide National Park Category:Stratovolcanoes