On the edge - Pentargon waterfall

The top of the Pentargon waterfall, taken from a rather precarious position just off the spectacular South West Coastal Path.

Just north-east of Boscastle, the short, steep-sided Pentargon valley ends abruptly, its waterfall plunging 120 ft over the sheer lip into the Pentargon inlet below. There are a number of these truncated valleys on the north Cornwall coast. Few of them extend far inland and often end with a spectacular, if small, waterfall over a vertical drop to the beach below.

The rocks are shales with thin turbidite sandstones - part of the Crackington Formation (upper Carboniferous) - which are deformed into tight horizontal recumbent folds.