They then took a boat trip from Dunglass Burn east along the coast with the geologist Sir James Hall of Dunglass.
They then took a boat trip from Dunglass Burn east along the coast with the geologist Sir James Hall of Dunglass and at Siccar Point found what Hutton called " a beautiful picture of this junction washed bare by the sea ", where 345 million year old Devonian Old Red Sandstone overlies 425 million year old Silurian greywacke.
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