Ichthyosaur Vertebrae Fossil Polished Block Lyme Regis Jurassic Coast UK Marine Reptile Fossil Black Ven Marls Specimen with COA

Description

Ichthyosaur Vertebrae Polished Fossil Block – Black Ven Marls, Lyme Regis

Presented here is a genuine Ichthyosaur vertebrae fossil preserved in a polished block from the famous Black Ven Marls of Lyme Regis, Dorset, United Kingdom. This specimen originates from the Lower Lias deposits of the Early Jurassic Period, approximately 199–190 million years ago, when the region that is now southern England lay beneath a warm shallow sea rich in marine life.

This fossil block contains preserved vertebrae from an ichthyosaur, a group of fast-swimming marine reptiles that dominated the oceans during the Jurassic. The block has been carefully polished to reveal the internal structure and cross-sectional detail of the vertebrae, creating an attractive and scientifically interesting display piece.

The fossil is a carefully selected specimen, and the listing photographs show the exact fossil you will receive. The specimen includes a Certificate of Authenticity lifetime guarantee generic card, confirming that the fossil is genuine.

Please refer to the listing photographs for full sizing and scale of the fossil block.

Ichthyosaurs – Iconic Marine Reptiles of the Jurassic Seas

Ichthyosaurs were highly adapted marine reptiles that lived during the Mesozoic Era, particularly throughout the Triassic and Jurassic periods. Their streamlined bodies, powerful tails, and paddle-like limbs made them extremely efficient swimmers.

Scientific classification of ichthyosaurs includes:

• Clade: Ichthyosauria

• Order: Ichthyosauria

• Class: Reptilia

These animals evolved body shapes remarkably similar to modern dolphins, although they were reptiles rather than mammals.

Ichthyosaurs possessed several distinctive anatomical features:

• Large eyes adapted for hunting in dim underwater environments

• Long narrow jaws lined with conical teeth for catching fish and squid

• Four paddle-shaped limbs used for steering

• Powerful tail flukes used for propulsion

• Numerous disc-shaped vertebrae forming a flexible spine

The vertebrae preserved in this specimen represent part of the spinal column that supported the body and tail during swimming.

Morphology of Ichthyosaur Vertebrae

Ichthyosaur vertebrae are distinctive and easily recognisable in the fossil record. Unlike the vertebrae of many land reptiles, ichthyosaur vertebrae are typically short, disc-shaped, and strongly compressed, giving them a characteristic coin-like appearance.

Typical features include:

• Rounded or slightly hexagonal vertebral centra

• Concave articular surfaces on both sides

• Fine internal bone structures visible when polished

• Compact bone architecture adapted for marine locomotion

When polished in cross-section, the internal structure of the vertebrae becomes visible, showing the dense mineralised bone that replaced the original skeletal tissue during fossilisation.

The polished surface of this specimen highlights the fossilised bone preserved within the surrounding sedimentary rock.

Black Ven Marls and the Lower Lias Formation

The fossil originates from the Black Ven Marls, part of the Lower Lias Group, one of the most famous fossil-bearing geological formations in the world.

These rocks date to the Early Jurassic Period, specifically the Hettangian to Sinemurian stages, roughly 199–190 million years ago.

The Lower Lias sediments were deposited within a shallow marine environment that covered much of southern Britain at the time. The deposits consist mainly of:

• Clay-rich marls and shales

• Thin limestone layers

• Fine marine sediments

These conditions allowed exceptional preservation of marine organisms.

The Lyme Regis coastline, particularly the cliffs around Black Ven, is internationally renowned for its fossil discoveries. Many important specimens of ichthyosaurs, plesiosaurs, ammonites, and other marine organisms have been discovered here since the early nineteenth century.

Jurassic Marine Ecosystem of Lyme Regis

During the Early Jurassic, the seas covering southern England were home to a diverse marine ecosystem.

Organisms preserved in the Lower Lias deposits include:

• Ichthyosaurs and other marine reptiles

• Plesiosaurs

• Ammonites and belemnites

• Marine fish

• Crustaceans and molluscs

Ichthyosaurs were among the top predators of this marine ecosystem, feeding on fish, cephalopods, and other marine animals.

The exceptional fossil preservation at Lyme Regis has made the area one of the most historically important fossil localities in the world and forms part of the UNESCO-listed Jurassic Coast World Heritage Site.

Polished Fossil Preparation

The polished surface of this fossil block has been prepared to reveal the fossil vertebrae more clearly within the rock matrix.

Polishing enhances the visual contrast between:

• The fossilised bone

• The surrounding sedimentary rock

• Internal structures preserved within the vertebrae

This type of preparation creates a specimen that is both scientifically interesting and visually striking, allowing collectors to see details that may not be visible on a rough surface.

Authenticity and Collector Information

• Genuine fossil specimen – not a cast or replica

• Fossil Type: Ichthyosaur Vertebrae

• Group: Ichthyosauria

• Geological Formation: Black Ven Marls, Lower Lias Group

• Age: Early Jurassic (~199–190 million years old)

• Locality: Black Ven, Lyme Regis, Dorset, United Kingdom

• Preparation: Polished fossil block revealing vertebrae cross-section

• Includes Certificate of Authenticity lifetime guarantee generic card

• The exact fossil shown in the photographs is the specimen you will receive

This authentic Ichthyosaur Vertebrae Fossil from the Jurassic Coast of Lyme Regis represents a striking example of marine reptile anatomy from the Early Jurassic seas and makes an excellent addition to any fossil collection, marine reptile display, or geological specimen cabinet.