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Sierra la Primavera volcano

Caldera 2270 m / 7,447 ft
Western Mexico, 20.62°N / -103.52°W
Current status: (probablemente) extinto (0 out of 5) | Reports
Sierra la Primavera volcano books
Typical eruption style: effusive
Erupciones del volcán Sierra la Primavera: no recent eruptions, about 30,000 years agoNo hay terremotos recientes
Fecha / HoraRevista / ProfundidadDistanciaUbicación
Sierra la Primavera volcano is a volcanic complex immediately west of Mexico's second-largest city Guadalajara. It contains a large caldera that formed about 95,000 years ago and produced major pumice flows forming ignimbrite layers.
The volcano could still be active, although the last activity probably dates back more about 30,000 years ago, when it formed a lava dome. Today, there are steam vents and hot springs at many locations of the complex.

Background:

The Sierra la Primavera volcanic complex produced rhyolitic lava flows and domes beginning about 120,000 years ago. A major Plinian eruption that erupted 20 cu km tephra occurred 95,000 years ago and was followed by the collapse of an 11-km-wide caldera. The deposits are known as Tala Tuff and contain spectacular pumice flow deposits.
The La Primavera caldera subsequently filled with water and formed a lake, inside which several lava domes were built. Another series of lava domes was built along the margin of the caldera between 95,000 and 75,000 years ago.
Tectonic uplift and sedimentation filled the lake, and another series of lava domes was erupted along the southern margin of the caldera beginning about 60,000 years BP.


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