Brasilia varians Ammonite Fossil Bajocian Burton Bradstock Dorset UK COA

Description

Brasilia varians Ammonite Fossil from Burton Bradstock, Dorset

This genuine Brasilia varians ammonite fossil comes from the Inferior Oolite Group at Burton Bradstock, Dorset, UK, and dates to the Bajocian Stage of the Jurassic Period. It is a carefully chosen fossil specimen, supplied with a Certificate of Authenticity lifetime guarantee generic card. Full sizing can be seen in the photo, and the image shows the actual fossil specimen you will receive.

Brasilia varians is a collectable British Jurassic ammonite, valued for its classic Dorset locality, attractive shell form and strong geological interest. Specimens from Burton Bradstock are especially popular with collectors of UK ammonites, Dorset fossils, Inferior Oolite fossils, Bajocian marine life and scientifically labelled natural history specimens.

Species and Scientific Interest

Brasilia varians is an extinct ammonite species belonging to the ammonoid cephalopods, a group of marine molluscs related to modern squid, cuttlefish and nautilus. Ammonites lived in ancient seas and produced coiled, chambered shells. The animal occupied the final body chamber, while the earlier internal chambers helped control buoyancy as it moved through the water column.

Brasilia is generally associated with the family Graphoceratidae, an important Middle Jurassic ammonite family known for compressed to moderately compressed shell forms, ribbed ornamentation and strong value in biostratigraphy. These ammonites are useful guide fossils because their shell features changed through time, helping geologists date and correlate Jurassic rock layers across different localities.

The species name varians reflects the naturally variable character often seen in ammonite shell form and ornamentation. A named Brasilia varians specimen is particularly appealing for collectors who prefer accurately labelled fossils with clear locality and stratigraphic information.

Inferior Oolite Group and Bajocian Geology

This fossil dates to the Bajocian Stage of the Middle Jurassic, approximately 168 to 170 million years old. During the Bajocian, southern Britain was covered by warm, shallow marine environments. These ancient seas supported a diverse ecosystem of ammonites, belemnites, bivalves, brachiopods, gastropods, echinoids, corals and other sea-floor organisms.

The Inferior Oolite Group is one of the classic fossil-bearing Jurassic rock units of southern England. It consists of limestones, oolitic sediments, marls, sands and shelly beds deposited in shallow marine conditions. The term “oolite” refers to small rounded carbonate grains that formed in agitated, warm marine water, later becoming part of the limestone.

Ammonites from the Inferior Oolite are especially important in palaeontology because they help define detailed fossil zones and faunal successions within the Middle Jurassic. Brasilia varians represents part of this important ammonite record and is an excellent example of the marine cephalopod life that flourished in Britain during the Bajocian.

Locality: Burton Bradstock, Dorset, UK

Burton Bradstock is a well-known Dorset fossil locality, famous for its Jurassic coastal exposures and fossil-bearing beds. The area forms part of Dorset’s wider Jurassic geological landscape and has long been valued by collectors for ammonites and other marine fossils. Fossils from Burton Bradstock are desirable because they combine classic British locality information with attractive natural preservation.

A labelled fossil from Burton Bradstock is ideal for collectors building a display of British Jurassic fossils, Dorset ammonites, Inferior Oolite specimens or educational geology material. The locality adds strong provenance, making the specimen more meaningful than an unlabelled ammonite.

Morphology and Display Features

Brasilia varians typically shows a coiled planispiral ammonite shell with visible whorls and natural ribbed ornamentation. Depending on preservation, specimens may display fine to moderate ribbing, whorl detail, growth features, natural surface texture and subtle changes in shell profile. These features formed part of the original shell and are important for both identification and display.

Natural colours may include cream, beige, grey, brown or iron-rich tones, influenced by the sediment and mineral conditions during fossilisation. Variations in matrix, surface detail, rib definition and preservation are part of the fossil’s authentic geological character. As the photo shows the actual fossil you will receive, this is an individual specimen rather than a generic stock example.

Authenticity and Collector Appeal

This Brasilia varians ammonite is a genuine Bajocian Jurassic fossil from the Inferior Oolite Group at Burton Bradstock, Dorset, UK. It includes a Certificate of Authenticity lifetime guarantee generic card, giving confidence to fossil collectors, geology enthusiasts, students and gift buyers.

With its named species, British locality, Inferior Oolite provenance and classic ammonite form, this fossil would make an excellent addition to a Jurassic fossil collection, Dorset ammonite display, educational geology cabinet, natural history collection or specialist British fossil suite.