The island of Gran Canaria

Origin of the islands of Palma and Gran Canaria the same and the same should be said about the islands of Fuerteventura and Lanzarote, extending from southwest to northeast. The first studies of Lanzarote were made by Leopold von Buhom and later studied in detail both islands Hartung. According to his relief, they differ sharply from the other team members and do not represent a single mountain, more or less significant quantities. Fuerteventura highest peak rises to 796 m, and Lanzarote in the 727 m above sea level. The oldest igneous rocks here are also the diabase and giperstenity, they are in direct contact with basalts and trachytes. Latest igneous rocks have basaltic nature and time of its formation fall into three formations, one after another. On the island of Lanzarote the most ancient of these basalts form only a cluster of slag crater and lava flows are absent. The second period is characterized by the appearance of a cone with craters and lava flows. Finally, the latest period were products of the terrible eruption, 1730 - 1736 G.; they were thrown out by a row of craters located along a straight line. Almost a third of the island was covered by lava flows, and the most significant volcanic mountain this time Montano de Fuego, rises to 533 m above sea level, and now even a moderately valid. The direction of this latest series of craters differs sharply from the stretch of ancient volcanic rocks: the whole island, its mountains and all the ancient crater located roughly from southwest to northeast, on the contrary, craters last century, going from west to east, parallel lines, which can be across the island of Ferro, Gomera, Gran Canaria and Tenerife. In the direction of the cracks were formed in six years at least 30 cones, they consist of lapilli and raised in height to 200 - 400 p. During these eruptions were thrown out huge masses of lava are relatively few products and loose, as it seems, there is little water vapor. Cone sprinkled with stones and slags, which are generally erupt occasionally in large masses. As for volcanic ash, which is usually all its mass exceeds the number of ejected lava, it is not present, the predominant role belongs to the lava. It covers an area of ??almost 3 square meters. geographical mile. Current news about not talking about a huge column of steam, the ash clouds, obscuring the light and turn day into night, is not mentioned as the earthquakes, and lava, apparently, for all the immensity of its mass was poured quietly. In describing the eruption said the allocation of lava cracks, which happened quite well, as is the case in Iceland. From the words of Don Andrea Lorenzo curvet, who was a priest in Yayse, a village located near the site of the eruption, Leopold von Buch, thus describes the catastrophe that occurred over 85 years before his visit to the Canary Islands.