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How Volcanoes Work Below: History of Volcanoes While earthquakes and hurricanes often seem the most devastating types of natural disasters, volcanoes can have more wide-ranging effects than either. Gallery As the Philippine's Mount Pinatubo showed in 1991, a volcano can create a cloud of sulfuric acid that encircles the entire planet. Personnel Management 2011 www.singaporehcsummit.comLeading HR Experts Share Insight On Personnel Management & Development.French Polishing Edinburg www.gabrielpolishing.co.ukWe are the cheapest French Polisher in Edinburgh,we also do MDF + GlassNMR Rock Core Analyser www.magritek.com/rcaFast NMR Rock Core analyser for oilfield reservoir core samplesAds by Google Volcanoes form w

Alfred Wegener proposed the theory of continental drift at the beginning of the 20th century. His idea was that the Earth's continents were once joined together, but gradually moved apart over millions of years. It offered an explanation of the existence of similar fossils and rocks on continents that are far apart from each other. But it took a long time for the idea to become accepted by other scientists.Before Weg

Wegener suggested that mountains were formed when the edge of a drifting continent collided with another, causing it to crumple and fold. For example, the Himalayas were formed when India came into contact with Asia.

se the Earth was cooling down, and in doing so contracted. This was believed to form wrinkles, or mountains, in the Earth's crust. If the idea was correct, however, mountains would be spread evenly over the Earth's surface. We know this is not the case.