Port Mulgrave / Runswick Bay, Yorkshire: ammonites and jet

Where: UK & Ireland · Europe · approx. 54.55, -0.76 (vicinity only)

Why this spot: Rockhounding locality: abandoned ironstone harbour under Lias shale cliffs, the serious collector's stretch of the jet coast north of Whitby

What turns up: ammonites (Dactylioceras, Hildoceras) in nodules, belemnites, jet washed loose, pyrite, occasional reptile bone

Access: Open / legal.

Collect loose nodules and washed jet from the beach; cliffs are SSSI and dangerously unstable, no digging into cliff or the old jet workings

Satellite view, historic-map overlays, tide/flow context and field notes are in the app. Exact research detail is part of Pro.