Original: Arising approximately 19 million years ago, the Vogelsberg, Germany's only shield volcano, is also Central Europe's largest basalt formation, consisting of a multitude of layers which, having flowed over each other, fall downward from their peak in ring-shaped terraces to the base.
Simplified: The Vogelsberg is about 19 million years old and is Germany's only shield volcano and the largest basalt formation of Central Europe. It consists of many layers which fall downward from their peak in ring-shaped terraces to the base.