Virtual Field Trip Assignment
The Petrified Forest of Lesvos Island Greece
“The island of Lesvos, situated in the northeast Aegean Sea, is the third largest Greek island, with an area of 630 square miles. On the western side of the island is Lesvos Petrified Forest comprising a great many number of exposed fossilized tree trunks. A protected natural monument, the Lesvos Petrified Forest consists of four major terrestrial and marine fossil sites lying on an area of 37,000 acres with a buffer zone of 49,400 acres”. (Zouros 2004)
Lesvos before the Petrification
According to greeknet.com 20 million Years ago, the western half of the island of Lesvos was populated which large numbers of diverse types of trees such as Beech, Pine, Plane Trees, Sequoias Palms and may other types of Trees and plants. The geology of Lesvos is abundant with andesites, dacites and rhyolites, ingnibrite, and pyroclastics.
How the Petrified Forest was Formed
“As there was great volcanic activity on Lesvos during the Oligocene and the Miocene ages, the volcanic ashes covered the trees of the area, which facilitated the fossilization process to turn them into Silicified remains of the subtropical woods on the Northern West area of Lesvos” (Greeka.com) According to lesvosonline.gr, the formation of the Lesvos Petrified Forest was the result of volcanic activity of the western area of Lesvos. During periods of forceful volcanic activity, lava, pyroclastic material and volcanic ash were ejected from the volcano, covering the adjacent plant life. Simultaneously, intensely hot solutions which had a high content of the chemical compound silica were formed. The silica-heavy...