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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

While some cards mention its existence from the 14th century, it is considered that the Santa Maria island was discovered by Portuguese sailors in the 15th century and the first of the populated islands forming the archipelago of the Azores, to 1430-1450 .

Sometimes called "yellow island" because of wild yellow flowers that bloom there in the month of February, she also called "Island of the sun", because of its drier climate over much of the island, and weather conditions more favorable than its neighbors throughout the year ... but it is also characterized by many other colors !

Santa Maria / Azores - organs of Ribeira do Maloás - photo Verdeazores

Santa Maria / Azores - organs of Ribeira do Maloás - photo Verdeazores

Santa Maria / Azores - organs of Ribeira do Maloás - photo Verdeazores

Santa Maria / Azores - organs of Ribeira do Maloás - photo Verdeazores

In the bed of the Ribeira do Maloás, 220 meters from its source, a waterfall of 15-20 meters showcases the prismation of a basaltic lava flow from the complex Pico Alto.

The prisms, UHF dimensions, form, at the top and bottom of the fall, a polygonal pavement  type Giants Causway.

Santa Maria / Azores - organs of Ribeira do Maloás - at the bottom of the fall, a polygonal pavement of erosion - doc. Wikiloc.

Santa Maria / Azores - organs of Ribeira do Maloás - at the bottom of the fall, a polygonal pavement of erosion - doc. Wikiloc.

Santa Maria / Azores - organs of Ribeira do Maloás detail - photo Paulo Henrique Silva

Santa Maria / Azores - organs of Ribeira do Maloás detail - photo Paulo Henrique Silva

In the extreme south of Santa Maria, Pontado do Castelo, a rocky promontory overlooking the sea.

The stratigraphic sequence includes marine sedimentary rocks, some with fossils, and submarine and sunaerian volcanic rocks. You can also see the vein intrusions.
 

Santa Maria / Azores - Pontado do Castelo - photo Geoparque Azores

Santa Maria / Azores - Pontado do Castelo - photo Geoparque Azores

Poço da Pedreira is an old quarry, where old basaltic scoria were exploited.

Consolidation over time of pyroclastic and red color of slag earned him the name of Pico Vermelho / red peak.

 

Santa Maria / Azores - Poço de Pedreira - photo Geoparque Azores

Santa Maria / Azores - Poço de Pedreira - photo Geoparque Azores

To Pedreira do Campo, a underwater sequence, old of 5 million years, is exposed, composed of marine sedimentary rocks rich in fossils at the base, and covered by basaltic hyaloclastite and pillow lavas.

These places are included among the 57 spots of the Azores Geopark.


 

Santa Maria / Azores - Pedreira do Campo - Photo Geoparque Azores

Santa Maria / Azores - Pedreira do Campo - Photo Geoparque Azores

Sources:

- Geoparque Açores - geossitios - link

- Verde Azzore - Vulcanismo Santa Maria - link

- Os Açores, ilhas de geodiversidade: o contributo da ilha de Santa Maria - João Carlos Nunes & al.

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