Rare Protocardia Fossil Bivalve Turonian Stage Cretaceous Marine Deposit Spain Genuine Specimen

Description

Genuine Fossil Bivalve – Protocardia

This listing features a genuine fossil bivalve of the genus Protocardia, dating to the Turonian Stage of the Cretaceous period, sourced from fossil-rich deposits in Spain. At over 90 million years old, this specimen represents an authentic piece of Earth’s deep geological past, preserved in remarkable detail. It has been carefully selected for quality and is shown in the photographs provided, complete with a 1 cm scale cube for accurate size reference. Every fossil is supplied with a Certificate of Authenticity, ensuring its scientific and collectible value.

Geological Context

The specimen originates from Turonian deposits within the Upper Cretaceous of Spain. The Turonian (approximately 93.9 to 89.8 million years ago) represents a period of significant marine transgressions when warm shallow seas extended over much of Europe. Sedimentation during this time favoured the preservation of calcareous organisms, including ammonites, echinoids, and a diverse range of bivalves such as Protocardia.

Spain’s Turonian strata are well known for their marine fossil assemblages, reflecting a shallow epicontinental sea environment. The fine-grained sediments, often calcareous marls and limestones, provided ideal conditions for the preservation of shells and marine fauna, capturing intricate structural details.

Taxonomy and Classification

• Kingdom: Animalia
• Phylum: Mollusca
• Class: Bivalvia
• Order: Cardiida
• Superfamily: Cardioidea
• Family: Cardiidae
• Genus: Protocardia

The genus Protocardia belongs to the cockles (Cardiidae), which are still represented in modern seas. This lineage has persisted for millions of years, demonstrating the evolutionary success and ecological adaptability of the group.

Morphological Features

The fossil displays the rounded, inflated shell shape characteristic of Protocardia, with well-marked radial ribs running across the surface. These ribs not only provided structural strength but also aided in stability within sandy and muddy marine substrates. The hinge area and growth lines are often preserved with excellent clarity, allowing collectors and researchers to study the development of the organism.

The symmetry between the valves is another defining feature of this genus. The shells exhibit a distinct convexity, with a strong, curved umbo pointing anteriorly. These adaptations highlight the lifestyle of a burrowing, filter-feeding bivalve, which lived partially embedded in soft sediment, drawing in nutrients from the surrounding water.

Scientific and Collector Value

Protocardia fossils are highly valued in both academic and collector circles due to their abundance in certain Cretaceous deposits and their importance as palaeoenvironmental indicators. As burrowing bivalves, their presence suggests stable, shallow-marine conditions with well-oxygenated sediments. This makes them useful in biostratigraphic studies, helping geologists to correlate rock layers across different regions.

For collectors, this specimen offers:

• A well-preserved Turonian fossil from Spain.
• Clear morphological features, including ribs and growth lines.
• Scientific significance in understanding Cretaceous marine ecosystems.
• A genuine, display-worthy fossil with guaranteed authenticity.

Provenance and Authenticity

This Protocardia fossil was discovered in the Turonian Cretaceous deposits of Spain and is guaranteed 100% genuine and natural. It has not undergone artificial restoration or enhancement and comes with a Certificate of Authenticity for complete peace of mind.

This Cretaceous bivalve fossil (Protocardia) offers a unique opportunity to own a genuine piece of natural history. Both scientifically informative and visually striking, it is a superb specimen for fossil collectors, geology enthusiasts, and anyone fascinated by the life that once thrived in the ancient seas of Europe.