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Pico de Príncipe is a mountain on Príncipe Island, the smaller of the two inhabited islands of São Tomé and Príncipe. The elevation of the mountain is generally given as , making it the highest peak on the island, but a trip to the peak in 1999 found that it may be lower than that, making the nearby Pico Mencorne the highest point. The island is one of the volcanic swells that make up the Cameroon line of extinct and active volcanoes. ==Topology== The mountain is the remains of a volcano that has been inactive for 15.7 million years. The volcanoes on this island were at first primarily basalt, but later phonolite intruded in their cores. The basalt has been deeply eroded, leaving spectacular towers of the harder phonolite rising almost vertically from the rainforest. The peak has only occasionally been explored, with the first expedition in 1929 having established a base on the top. A second trip was made in 1956, but could not make a serious botanical inventory due to poor weather. The 1999 trip found that the mountain rises from a heavily forested plateau with elevation . From there, a series of ridges lead to the summit. At higher elevations the trees are more open and there are more epiphytes - plants that grow on the trees. The summit is a small mound surrounded on three sides by precipices.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pico de Príncipe」の詳細全文を読む スポンサード リンク
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