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Earth of fire

Actualité volcanique, Article de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié par Bernard Duyck
Publié dans : #Excursions et voyages

Pico Island, immediately adjacent to Santa Maria which it is separated only by a shallow sea arm, is dominated by the volcano of the same name. Its area is 445 km ² and is 42 km by 15.2. Discovered before 1439, it was first called all São Dinis, before being colonized from 1460.
 

Pico / Azores - the Montanha do Pico - photo Geoparque Azores.

Pico / Azores - the Montanha do Pico - photo Geoparque Azores.

The Montanha do Pico, or Ponta do Pico, is a stratovolcano which rises to 2,351 meters above sea level. The dominant basaltic volcano was built on the volcanic complex Montanha, a former elongated volcano slopes more sweet, consisting of basaltic lava flows and adventitious cones.

He wears a summit crater 500 meters wide and 30 meters deep, in which there is a small cone with steep walls 70 meters high: Pico Pequeño or Piquinho, one of the few peaks of the Azores to be covered with snow in winter.

The top of the Piquinho present a permanent degassing consisting of water vapor at a temperature between 50 and 75 ° C (depending on the boiling temperature settings  function of altitude and barometric pressure)

 

Pico / Azores - the top of the Montanha do Pico, with the Pico Piquinho and snowy high slopes

Pico / Azores - the top of the Montanha do Pico, with the Pico Piquinho and snowy high slopes

Pico / Azores - the Montanha do Pico - the summit crater - photo Unukorno

Pico / Azores - the Montanha do Pico - the summit crater - photo Unukorno

Pico / Azores - the Montanha do Pico - Pico Piquinho - photo Unukorno

Pico / Azores - the Montanha do Pico - Pico Piquinho - photo Unukorno

Historical eruptions are located on the slopes of Pico and in the east rift zone dotted with pyroclastic cones Hawaiian / Strombolian type:  the Sao Roque Piedade volcanic complex.

In 1562-64, the rift area southeast produced lava flows that reached the north coast; near vent is responsible for a lava flow joining the sea on the south coast. The flank eruption of 1718 fueled flows that reached the both coasts.

The last eruption, located on the SE flank at 400 meters, is dated 1720.

Left, Pico - the lava flows of historical eruptions - doc Padang & al - right, the relief of the island, with Montanha do Pico and cones dotting the East Rift Zone - doc. Governo Regional dos Açores - a click to enlargeLeft, Pico - the lava flows of historical eruptions - doc Padang & al - right, the relief of the island, with Montanha do Pico and cones dotting the East Rift Zone - doc. Governo Regional dos Açores - a click to enlarge

Left, Pico - the lava flows of historical eruptions - doc Padang & al - right, the relief of the island, with Montanha do Pico and cones dotting the East Rift Zone - doc. Governo Regional dos Açores - a click to enlarge

To the west of Pico, in the channel of Faial, the Ilheus da Madalena, 52 and 59 meters high, are the remains of a volcanic underwater apparatus destroyed by wave erosion and tectonic forces. They consist of palagonitised tuff ,of phreatomagmatic origin.

 Pico / Azores - the Ilheus da Madalena - photo from Wikimedia commons

Pico / Azores - the Ilheus da Madalena - photo from Wikimedia commons

Seen from Pico, Ilheus da Madalena and in the background, the island of Faial - photo Carlos Luis MC da Cruz

Seen from Pico, Ilheus da Madalena and in the background, the island of Faial - photo Carlos Luis MC da Cruz

The vineyards of Pico and the Currais :

The vineyards of Pico form a landscape listed by UNESCO in 2004.

Vines are planted in a rich, dark volcanic soil in small plots surrounded by walls facts in lava rock (from mopping the soil at walls implantation). These walls, reaching the waist, called " Currais or Curraletas ", have a protective function against salt spray near the ocean, and recovery and storage of heat returned to the grapes during the night.

Grapes of exceptional quality produce excellent sweet wine, the Verdelho do Pico, "bronze and aristocratic."

"Basalto", "Lajido" and "Terras de Lava" are designations of Pico wines that refer to a human-nature relationship that the islanders are honored. The wine cooperative of Pico Island, to Areia Larga, focused the local production, which adopted new varieties, and can be visited.

Other local delicacies: eaux-de-vie of fig and loquat, honey of Pittosporum flowers, cheese soft dough of Pico.

 

Museu do Vinho do Pico, curraletas of vinha - photo José Luis Ávila Silveira / Pedro Noronha e Costa

Museu do Vinho do Pico, curraletas of vinha - photo José Luis Ávila Silveira / Pedro Noronha e Costa

Sources :

- Geoparque Açores - Pico - link

- Global Volcanism Program - Pico

- Siaram - Visitazores - le patrimoine - link

- Le Monde - "Aux Açores, sur les pentes du Pico - une île noire, enivrante" - link

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