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The Madeira river rises more than 15 m (50 ft) during the rainy season, and ocean vessels may ascend it to the Falls of San Antonio, near Porto Velho, Brazil, 1,070 km (660 mi) above its mouth; but in the dry months, from June to November, it is only navigable for the same distance for craft drawing about 2 meters (7 ft) of water. The Madeira ...
The rainfall was associated with an active cold front and an Atlantic low-pressure area that was over the Azores and moved northeastwards on 19 February 2010. [3]This storm was one in a series of such storms that affected Spain, Portugal, Morocco and the Canary Islands with flooding, rain and high winds.
Groundwater on Madeira is held in fractured volcanic rock aquifers, with widely varying transmissivity and dissolved mineral content. Water is generally slightly acidic to slightly alkaline and cold, although there are small quantities of thermal water near fault zones. Much of the water on the island comes from high-discharge springs. [5]
Madeira island is at the top of a massive shield volcano that rises about 6 km (20,000 ft) from the floor of the Atlantic Ocean, on the Tore underwater mountain range. [58] The volcano formed atop an east–west rift [ 59 ] [ 60 ] in the oceanic crust along the African Plate , beginning during the Miocene epoch (5 million years ago), continuing ...
Global ocean temperatures have reached a record high, prompting warnings of serious consequences for the Earth’s climate. Reaching an average of 20.96C, according to the EU’s climate change ...
As of 2021, Madeira had a total population of 245,595. The island is the top of a massive submerged shield volcano that rises about 6 km (3.7 mi) from the floor of the Atlantic Ocean. The volcano formed atop an east–west rift [ 1 ] [ 2 ] in the oceanic crust along the African plate , beginning during the Miocene epoch over 5 million years ago ...
Serra da Estrela, the highest mountain range in continental Portugal and popular tourist winter destination The volcanic lake of Lagoa das Furnas, on the island of São Miguel Portugal is located on the western coast of the Iberian Peninsula and plateau, that divides the inland Mediterranean Sea from the Atlantic Ocean .
For research purposes, the Madeira Abyssal Plain can be divided into three sub-basins. They are a southern sub-basin, which lies at a water depth of about 5,350 meters (17,550 ft), a central sub-basin which lies at a deeper water depth of about 5,440 meters (17,850 ft), and the northern sub-basin which lies at an intermediate water depth of about 5,420 meters (17,780 ft).