Huge Shark Coprolite Fossil Jurassic Lyme Regis Dorset UK Specimen – Charmouth Mudstone Sinemurian Pliensbachian Fossilized Shark Dung

Description

Huge Shark Coprolite Fossil from the Jurassic Coast

This genuine shark coprolite fossil originates from the famous Charmouth Mudstone Formation at Lyme Regis, Dorset, United Kingdom, part of the internationally renowned Jurassic Coast World Heritage Site. The specimen dates to the Lower Jurassic Period, specifically the Sinemurian to Pliensbachian stages, approximately 199–183 million years ago.

Coprolites are fossilised feces, and they provide valuable insight into the diets and behaviour of ancient animals. Shark coprolites from the Jurassic seas of Lyme Regis are particularly interesting because they often contain traces of the prey consumed by these early marine predators. These fossils preserve direct evidence of the food chain in prehistoric marine ecosystems.

This large specimen represents a striking example of fossilised digestive remains produced by a Jurassic shark inhabiting the warm seas that once covered southern Britain.

Geological Formation and Stratigraphic Context

The fossil comes from the Charmouth Mudstone Formation, a thick sequence of dark marine mudstones and shales deposited during the Early Jurassic along the margins of the ancient Tethys Ocean. These sediments formed within a quiet offshore marine basin, where fine muds slowly accumulated on the seabed.

The Charmouth Mudstone is well exposed along the coastline between Lyme Regis and Charmouth, where coastal erosion continually reveals fossils that have been preserved within the soft shale layers.

This formation is famous for its rich fossil content, including ammonites, belemnites, bivalves, fish, marine reptiles such as ichthyosaurs and plesiosaurs, and various trace fossils such as coprolites. The fine-grained nature of the sediments allowed organic remains to be buried quickly, increasing the likelihood of fossil preservation.

Origin of Shark Coprolites

During the Early Jurassic, numerous species of sharks inhabited the shallow marine environments around what is now southern England. These sharks belonged to groups of early cartilaginous fishes within the class Chondrichthyes, animals whose skeletons were primarily composed of cartilage rather than bone.

Because cartilage rarely fossilises, teeth and trace fossils such as coprolites provide important evidence for the presence and behaviour of these ancient predators.

Coprolites form when fecal material becomes rapidly buried in sediment before it can break down completely. Over millions of years, the organic material becomes mineralised, often through the replacement of original components with phosphate minerals, creating dense fossilised specimens.

Morphology and Notable Features

Shark coprolites typically display several characteristic features that distinguish them from ordinary sedimentary nodules. These may include:

• Spiral or cylindrical structure reflecting the internal anatomy of shark intestines
• Dense phosphatic composition
• Surface textures formed during digestion and excretion
• Occasionally visible inclusions of fish scales, bone fragments, or shell material

Many sharks possess a spiral valve intestine, an anatomical structure that produces a spiral pattern within the fecal mass. In well-preserved coprolites, this internal structure may sometimes be visible as ridges or twisting patterns on the fossil surface.

The large size of this specimen suggests that it was produced by a substantial marine predator inhabiting the Jurassic seas.

Jurassic Marine Ecosystem of Lyme Regis

During the Sinemurian and Pliensbachian stages of the Early Jurassic, the region around Lyme Regis was submerged beneath a warm shallow sea rich in marine life. These waters supported a diverse ecosystem including ammonites, belemnites, crustaceans, fish, and numerous marine reptiles.

Sharks played a crucial role as mid- to high-level predators within this ecosystem. Their feeding activities contributed to the recycling of organic material within the marine environment, while their shed teeth and coprolites occasionally became preserved in the sediment.

The Charmouth Mudstone sediments provide an exceptional record of this marine ecosystem, preserving not only skeletal remains but also trace fossils such as coprolites that reveal behavioural aspects of prehistoric life.

Authentic Fossil Specimen

This fossil is a genuine shark coprolite from the Charmouth Mudstone Formation of Lyme Regis, Dorset, UK. The specimen has been carefully selected for quality and display appeal.

The photograph shows the actual fossil specimen you will receive, allowing collectors to see the natural fossil structure and preservation within the surrounding matrix.

Full sizing please see photo.

Certificate of Authenticity

This fossil includes a Certificate of Authenticity lifetime guarantee generic card, confirming that the specimen is a genuine natural fossil.

Coprolites from the Jurassic Coast provide a rare glimpse into the feeding behaviour of ancient marine predators. A large shark coprolite from the Charmouth Mudstone Formation represents a fascinating and unusual fossil specimen, making it a distinctive addition to any fossil collection, geological display, or educational exhibit.