Our trip started with a walk along the beautiful Lauterbrunnen Valley this morning. David found this narrative about the area : It is little wonder that, only 50 years ago, geologists had little idea of how the Alps were formed, or of the mess which is their geology. The thick beds of Jurassic limestone were deposited as calcareous mud around 140 million years ago, and the Alps began to form about 35 million years ago, when the African tectonic plate forced its way into the more stable tectonic plates of Europe and Asia. These mighty tectonic forces twisted and contorted the rocks, which have been exposed in the steep walls of the valley, which were carved out by glacial action during the last ice age.
Posted on: Wed, 10 Jul 2013 15:30:35 +0000
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