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Jutland · Denmark

Mors Island Mo-clay

Permit required📚 Compiled from public sourcesLimited inputs

The Eocene Fur (Mo-clay) Formation on Mors and Fur islands in the Limfjord is world-famous for exquisitely preserved fish, insects, and shark teeth in laminated diatomite. Local moler quarries and coastal exposures are accessible with respect for landowner rules.

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Geology
FormationsFur Formation (Mo-clay)
EpochsEarly Eocene
Age~55 million years
Star speciesStriatolamia macrota, Otodus obliquus
Technique

Visit the Molermuseet on Mors first. The museum runs guided digs in adjacent quarries during summer. Coastal exposures along the Limfjord can be searched at low water.

Access

Quarry digs through Molermuseet (paid). Coastal foreshore is open with normal Danish 'allemansretten'-style access norms.

Legality & ethics

Danish heritage law: significant vertebrate fossils belong to the State (Danekrae rule) and must be reported. Hobby material is yours.

Hazards
  • Slick mo-clay (slippery)
  • Cold North Sea wind
  • Quarry equipment if visiting active sites
Insider tips
  • Book the Molermuseet's organized dig — best legal access and you keep what you find (within Danekrae rules)
  • Mo-clay splits along bedding planes — use a thin chisel and split rather than chip
  • The Limfjord ferries connect Mors and Fur cheaply
References & further reading

Shark teeth findable here

Trophy = headline find · Rare = real score · Uncommon = some trips · Common = most trips.

Also findable here

The beachcomber's bonus round — what else the geology gives up.

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