Stock Photo - rocks of Silurian age Llandovery era forming a well-developed turbidite sequence of dark silty shales alternating with paler sandstones and gritstones, Tanybwlch cliffs, Aberystwyth Wales UK

Stock Photo: rocks of Silurian age Llandovery era forming a well-developed turbidite sequence of dark silty shales alternating with paler sandstones and gritstones.

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