Gran Canaria (Spanish pronunciation: [ɡɾaŋ kaˈna.ɾja]; originally meaning 'Great [Island] of Dogs') is an island of the Canary Islands. Located in the Atlantic Ocean about 150 kilometers (~93 miles) off the northwestern coast of Africa and about 1350 km (~838 miles) from Europe. Gran Canaria is the second most populous island of the Canary Islands after Tenerife, and the third largest in area after Tenerife and Fuerteventura.
Geography
Gran Canaria is located southeast of Tenerife and west of Fuerteventura. The island is of volcanic origin, mostly made of fissure vents. Gran Canaria is the second most populous island of the Canary Islands after Tenerife. Gran Canaria's surface area is 1,560 km² and its maximum altitude is 1,949 meters (Pico de Las Nieves). It has a round shape, with a diameter of approximately 50 km.] Geology
About 80% of the volume of the island was formed during the Miocene period, between 14 and 9 million years ago. This is called the "Old Cycle" and is estimated to have lasted some 200,000 years and have emitted about 1000 km3, mostly of fissural alkali basalt. This cycle continued with the emission of trachytes, phonolites and peralkaline rocks. This period was followed by one of erosion, which lasted some 4 million years.
A second cycle of volcanic eruptions, known as the "Roque Nublo cycle", took place between 4.5 and 3.4 million years ago. This shorter cycle emitted about 100 km3. Most of the inland peaks were formed by erosion from these materials. This period also started with fissural basalts, but ended with violent eruptions of pyroclastic flows. Some phonolitic features, like the Risco Blanco, were also formed in its last stages.
The third or recent cycle is held to have started some 2.8 million years ago and is considered to be still active. The last eruptions are held to have occurred some 3500 years ago.
The changes in volume, and therefore, weight, of the island have also caused the island to rise above the previous sea level during erosive periods and to sink during eruptive periods. Some of these "fossil beaches" can be seen in the cliff faces of the more eroded northern coast.
About 80% of the volume of the island was formed during the Miocene period, between 14 and 9 million years ago. This is called the "Old Cycle" and is estimated to have lasted some 200,000 years and have emitted about 1000 km3, mostly of fissural alkali basalt. This cycle continued with the emission of trachytes, phonolites and peralkaline rocks. This period was followed by one of erosion, which lasted some 4 million years.
A second cycle of volcanic eruptions, known as the "Roque Nublo cycle", took place between 4.5 and 3.4 million years ago. This shorter cycle emitted about 100 km3. Most of the inland peaks were formed by erosion from these materials. This period also started with fissural basalts, but ended with violent eruptions of pyroclastic flows. Some phonolitic features, like the Risco Blanco, were also formed in its last stages.
The third or recent cycle is held to have started some 2.8 million years ago and is considered to be still active. The last eruptions are held to have occurred some 3500 years ago.
The changes in volume, and therefore, weight, of the island have also caused the island to rise above the previous sea level during erosive periods and to sink during eruptive periods. Some of these "fossil beaches" can be seen in the cliff faces of the more eroded northern coast.
Climate
Gran Canaria is noted for its rich variety of micro climates. Generally speaking though, the average daytime high ranges from 20°C in winter, to 26°C in summer. Some cool nights occur in winter, but lows below 10°C are unknown near the coast. Inland the climate is still mild but mountainous areas see the occasional frost or snow. Annual rainfall averages 228 mm, most of this falling in the cooler months, with July, August and September normally rainless. Rainfall is unevenly distributed through the island with some areas being much drier than others. Cloud cover and sunshine is often quite variable during the cooler months, and there can be several rather cloudy days at times in winter. Summers are generally quite sunny however, with the south of the island being most favoured.
Gran Canaria is noted for its rich variety of micro climates. Generally speaking though, the average daytime high ranges from 20°C in winter, to 26°C in summer. Some cool nights occur in winter, but lows below 10°C are unknown near the coast. Inland the climate is still mild but mountainous areas see the occasional frost or snow. Annual rainfall averages 228 mm, most of this falling in the cooler months, with July, August and September normally rainless. Rainfall is unevenly distributed through the island with some areas being much drier than others. Cloud cover and sunshine is often quite variable during the cooler months, and there can be several rather cloudy days at times in winter. Summers are generally quite sunny however, with the south of the island being most favoured.
