Azores « ExploreVolcanoesNow™

Agua de Pau, Azores

By ExploreNow Editor, on April 2nd, 2012%

Volcano Type: Stratovolcano
Volcano Status: Historical
Last Known Eruption: 1564
Summit Elevation: 947 m 3,107 feet
Latitude: 37.77°N 37°46’0″N
Longitude: 25.47°W 25°28’0″W

Agua de Pau stratovolcano in central Sao Miguel Island contains an outer 4 x 7 km caldera formed about 30,000 to 45,000 years ago and an inner 2.5 x 3 km caldera that was created about 15,000 years ago. The younger caldera is partially filled by the Lagoa do Fogo caldera lake.

Several post-caldera lava domes were emplaced on the northern and western flanks of the volcano, but activity in the caldera did not resume until about 5000 years ago. The 3-cu-km Fogo-A plinian pumice-fall deposit, the product of the largest-known Holocene eruption in the Azores, was emplaced at this time. Numerous flank cinder cones mark radial and concentric fissures, some of which have been active during historical time. The latest trachytic explosive eruption took place during 1563. Prominent hot springs are located on the NW flank.

Serra de Água de Pau (Moacir de Sa Pereira)

Agua de Pau (Edo Jan Meijer)

Originally posted 2010-10-26 10:10:25.

Terceira, Azores

By ExploreNow Editor, on November 26th, 2011%

Volcano Type: Stratovolcanoes
Volcano Status: Historical
Last Known Eruption: 2000
Summit Elevation: 1023 m 3,356 feet
Latitude: 38.73°N 38°44’0″N
Longitude: 27.32°W 27°19’0″W

Terceira Island contains four stratovolcanoes constructed along a prominent ESE-WNW-trending fissure zone that cuts across the island. Historically active Santa Barbara volcano at the western end of the island is truncated by two calderas. The youngest of these formed about 15,000 years ago. Comenditic lava domes fill and surround the caldera.

Pico Alto lies north of the fissure zone in the north-central part of the island and contains a Pleistocene caldera largely filled by lava domes and lava flows. Guilherme Moniz caldera lies along the fissure zone immediately to the south, and 7-km-wide Cinquio Picos caldera at the SE end of the island is the largest in the Azores. Historical eruptions have occurred from Pico Alto, the fissure zone between Pico Alto and Santa Barbara, and from submarine vents west of Santa Barbara. Most Holocene eruptions have produced basaltic-to-rhyolitic lava flows from the fissure zone transecting the island.

Terceira (Paulo Santos)

Agriculture in Terceira island, Azores (Hélder Cotrim)

Terceira (Francisco Antunes)

Terceira (Vasco da Câmara Pereira)

Terceira (Ana Melo)

Originally posted 2010-10-26 10:10:16.

Sete Cidades, Azores

By ExploreNow Editor, on October 15th, 2011%

Volcano Type: Stratovolcano
Volcano Status: Historical
Last Known Eruption: 1880
Summit Elevation: 856 m 2,808 feet
Latitude: 37.87°N 37°52’0″N
Longitude: 25.78°W 25°47’0″W

Sete Cidades volcano at the western end of Sao Miguel Island contains a 5-km-wide summit caldera, occupied by two caldera lakes, that is one of the scenic highlights of the Azores. The steep-walled, 500-m-deep caldera was formed about 22,000 years ago, and at least 22 post-caldera eruptions have occurred.

A large group of Pleistocene post-caldera trachytic lava domes, lava flows, and pyroclastic-flow deposits is found on the western-to-northern flanks. A nearly circular ring of six Holocene pyroclastic cones occupies the caldera floor. These have been the source of a dozen trachytic pumice-fall deposits erupted during the past 5000 years. Sete Cidades is one of the most active Azorean volcanoes. Historical eruptions date back to the 15th century and have occurred from within the caldera and from submarine vents off the west coast.

Sete Cidades (Cristiano Abreu)

Sete Cidades' Green Lagoon (Lourita Sousa)

Sete Cidades' Green Lagoon - Island of São Miguel - Azores (Francisco M S Botelho)

Sete Cidades (Gilda Pontes)

Sete Cidades (Jorge Cardoso)

Sete Cidades / Lagoa Azul (Jorge Cardoso)

Sete Cidades / Lagoa Azul (Ana Louro)

View of one of the lakes of Sete Cidades which is a collapsed volcano which blew its top off in San Miguel, Azores (Roy McGrail)

Originally posted 2010-10-26 10:11:50.

ExploreVolcanoesNow™ Original Content & Website Copyright © 2012 McGuinnessPublishing - All Rights Reserved This is a scholarly work for non-profit educational purposes. Presented FREE to students, teachers & educators, and the public in the interest of developing awareness of the subject and in helping to preserve our common heritage. Some content is public domain, some content used under "Fair Use" provision of section 107 U.S. Copyright Law. Some content from third-parties. All third-party copyrights acknowledged. Sources credited where possible or known. If we have not correctly credited a source - please let us know.

An ExploreNow™ website published by McGuinnessPublishing - some content BFA Designs - View the About Page for additional trademark & copyright info.

29 queries. 0.431 seconds.

Rss Feed Tweeter button Facebook button Technorati button Reddit button Myspace button Linkedin button Webonews button Delicious button Digg button Flickr button Stumbleupon button Newsvine button Youtube button

Agua de Pau, Azores

Terceira, Azores

Sete Cidades, Azores

Recent Volcano Entries

Volcano Categories

Buzz Us!

Facebook Buzz

Twitter Buzz

ExploreNow Websites

ExploreVolcanoesNow

McGuinnessPublishing

Find Volcanoes Here