Tambroso is a mountain peak on the Azorian island of Faial. It is located in the

civil parish In England, a civil parish is a type of administrative parish used for local government. It is a territorial designation which is the lowest tier of local government. Civil parishes can trace their origin to the ancient system of parishes, w ...

of Ribeirinha, in the municipality of

Horta Horta may refer to: People * Horta (surname), a list of people Places * Horta, Africa, an ancient city and former bishopric in Africa Proconsularis, now in Tunisia and a Latin Catholic titular see * Horta, Azores, Portugal, a municipality a ...

. The mountain, as well as its surrounding land-forms, is geographically close to the

volcanic A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often fo ...

caldera A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. An eruption that ejects large volumes of magma over a short period of time can cause significant detriment to the str ...

at the center of Faial. The eruptive igneous rocks produced by this caldera forms the base of Tambroso, as well as many other peaks on Faial Island. The whole series of peaks has a maximum elevation at

Cabeço Gordo Cabeço Gordo ( Portuguese for "fat mound") is the highest point in the island of Faial, measuring above sea level. Located on the southern rim of the Caldeira Volcano, on a clear day, most of the islands of the central group of the Azores are ...

, which is above sea level.

Geography and geology

The elevation of Tambroso itself reaches to above sea-level. It is situated near another local peak, Alto da Pedreira, and the town of Ribeirinha. Climatically, the mountain is situated in a temperate ocean climate, as is the rest of Faial Island. The rocks that make up much of the Azores are generally related to a

triple junction A triple junction is the point where the boundaries of three tectonic plates meet. At the triple junction each of the three boundaries will be one of three types – a ridge (R), trench (T) or transform fault (F) – and triple junctions can be ...

which produces

Neogene The Neogene ( ,) is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago ( Mya) to the beginning of the present Quaternary Period million years ago. It is the second period of th ...

-aged, intrusive and extrusive/ eruptive,

mafic A mafic mineral or rock is a silicate mineral or igneous rock rich in magnesium and iron. Most mafic minerals are dark in color, and common rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite. Common mafic rocks include ...

igneous rock Igneous rock ( ), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rocks are formed through the cooling and solidification of magma or lava. The magma can be derived from partial ...

s, and sedimentary formations derived from them. The rocks that form Tamborso are mapped as part of the Cedros volcanic complex. Pimentel, A. H. G. (2016). Pyroclastic density current-forming eruptions on Faial and Terceira Islands, Azores. The lower portion of this volcanic complex's formation began in the middle

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

Chibanian The Chibanian, more widely known as the Middle Pleistocene (its previous informal name), is an Age (geology), age in the international geologic timescale or a Stage (stratigraphy), stage in chronostratigraphy, being a division of the Pleistocen ...

age, while upper portion consists mainly of

pyroclastic Pyroclast, Pyroclastic or Pyroclastics may refer to: Geology * Pyroclast, or airborne volcanic tephra fragments * Pyroclastic rock, rock fragments produced and ejected by explosive volcanic eruptions * Pyroclastic cone, landform of ejecta fro ...

flows and other deposits that date from the late Pleistocene up to the year 1958, which marked the most recent eruption on Faial Island. The area around the base of Tambroso may also be affected by uplift and other types crustal movement along an east-west trending fault which is situation to the south of the mountain.

References

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* {{authority control Geology of the Azores Faial Island

Geography and geology

See also

References

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