Iberian geography, history, geology, environment and climate > Geography and geology

Rock id please


All the rocks in this picture are from one river bed in the Alpujarras. I picked them up just after the Rio Trevelez and Poqueira join. (The penknife is there as a size guide and I know where that came from!) What I would like to know is - Why are there are so many different types of rock in the same area and I'd also like to know what they are. Any help would be greatly appreciated!



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