The Old Red Sandstone Continent
In Devonian times, the erosion of the Caledonian chain gave rise to several thousands of metres of brightly coloured conglomerates, sandstones and shales. These detrital sediments are called the Old Red Sandstone. They accumulated on a vast North Atlantic continent stretching from the Rocky Mountains to the Urals, with especially fine outcrops in Scotland and Wales.
KeywordsPhytoplankton Sandstone Sedimentation Calcite Shale
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