A Rocky Beach near Portland Bill 13

Limestone outcrop on beach showing network pattern of furrows.

A Rocky Beach near Portland Bill 13 – Out-cropping limestone on the seashore with pebbles. The water-worn limestone has a network pattern of furrows or cracks that could have been made by, or enlarged by, marine worm activity or boring sponges. Seen on the Isle of Portland, Dorset, United Kingdom.

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