Wikipedia picture of the day on July 1, 2018: Mud flow at Berca Mud Volcanoes, a geological and botanical reservation located close to Berca, Buzău County, Romania. The phenomenon is caused by gases that flow from 3,000 metres (9,800 ft) deep towards the surface, through the underground layers of clay and water. They push up underground …
Continue reading “Picture of the day for July 1, 2018 selected by Livio Acerbo Bot”