Fossils of the Jurassic Coast

There are so many amazing fossils of the Jurassic Coast it would take a long time to go through them all. Here is a summary of the major groups to give you an idea of how diverse and abundant our fossils are. Take a look at the Fossil Finder database to see some more examples of fossils from these groups.


Lobster Sidmouth Museum
Lobster, Sidmouth Museum

Crustaceans

Lobsters don’t just make a delicious dinner; they also make fantastic fossils. These animals haven’t changed very much over millions of years and would have lived as they do today, scavenging and hunting on the seabed for food.

Find out more on the crustaceans page.

 


Brittle stars (echinoderms)
Brittle stars, Bridport Museum

Echinoderms

‘Spiny skinned’ (echinoderm) creatures like starfish and sea urchins are another survivor through time. Their delicate fossils look almost identical to their modern counterparts. Generally they come from rocks that formed in shallow seas. Their cousins, the crinoids, look like beautiful plants when fossilised whole and are sometimes called sea lilies.

Find out more about brittle stars on the echinoderms pages.


Dapedium fish Lyme Reis Museum
Dapedium fish, Lyme Regis Museum

Fish

Our amazing fish, shark and ray fossils span the Triassic, Jurassic and Cretaceous periods. They help us understand the ancestry of modern fish species alive today.

Find out more on the fish page.

 


Insect wing, Dorset County Museum
Insect wing, Dorset County Museum

Insects

True survivors, many of the insects we find in our gardens today flourished during the Mesozoic Era and are found as fossils on the Jurassic Coast, including crane flies, grasshoppers and dragon flies.

Find out more on the insects page.


Mammal tooth, Dorset County Museum
Mammal tooth

Mammals

Some of the rarest fossils on the Jurassic Coast come from ancient mammals. We only find mammal fossils here from the middle of the Jurassic Period and the beginning of the Cretaceous period and they are generally just tiny teeth! Even so, they are internationally important as evidence of the evolution of mammals.

Find out more on the mammals page.


Ammonite, Bridport Museum
Ammonite, Bridport Museum

Molluscs and Brachiopods

Molluscs and brachiopods include some of the most common fossils like clams, sea shells and belemnites and also some of the most beautiful like sea-snails, nautilus and ammonites. Generally they are the remains of marine creatures and so are only found here in Jurassic and Cretaceous aged rocks.

Find out more about bivalves on the molluscs pages.


Plant connifer branch Portland Museum
Conifer branch, Portland Museum. Photo: Paul Carter

Plants

Flowering plants didn’t appear until early in the Cretaceous period, so most of the fossilised plants from the Jurassic Coast are conifers, cycads, tree ferns and horsetails. There is one very famous layer of limestone on the Jurassic Coast where fossil trees are found. We call it the Fossil Forest. It is exposed on the cliffs near Lulworth Cove but was also quarried on Portland in the past. As a result Portland Museum has one of the most important collections of fossil cycads in the world.

Find out more on the wood and plants page.


Reptiles and Amphibians

Ichthyosaur fossil Dorset County Musum
Ichthyosaur, Dorset County Museum

The Mesozoic Era is known as the Age of Reptiles, as it is when they came to totally dominate animal life on Earth. The Jurassic Coast is one of the most important sources of Jurassic reptile fossils in the world, including ichthyosaurs, plesiosaurs, giant pliosaurs and even a unique dinosaur called Scelidosaurus. Along with these creatures there are giant amphibians from the Triassic period and pterosaurs, crocodiles and dinosaurs from the Cretaceous period, all coming from different parts of the coast. Why have one globally important source of fossils when you can have several?

Find out more on the reptiles pages.


Dinosaur track footprint Dorset County Museum
Dinosaur Track, Dorset County Museum

Trace Fossils

Burrows, tracks and trails are probably the most common fossils on the Jurassic Coast. They can be used to help reconstruct seabed habitats and even provide evidence of the recovery of marine ecosystems after the mass extinction at the end of the Triassic period. Dinosaur tracks are quite common in certain rock layers. You can see some of these on display at the Dorset County Museum.

Find out more on the trace fossils page.


 

Click here to find out more about fossil hunting on the Jurassic Coast.