#Cretaceous flint fossil

[uk-fossils]

Fossil Flint Echinoid (Shepherd’s Crown) – Cretaceous Chalk, Seaford Head, Sussex UK – British Sea Urchin Fossil with Certificate

This listing features a genuine Fossil Flint Echinoid, often affectionately referred to as a "Shepherd’s Crown", collected from the Cretaceous Chalk deposits of Seaford Head, Sussex, UK. These iconic echinoid fossils are preserved in flint—a result of millions of years of mineral replacement after the creature’s death on the seabed.

The chalk cliffs of Seaford Head are part of the Upper Cretaceous sequence of southern England, dating back approximately 100 to 66 million years ago. The echinoid species, most likely within the genus Conulus or Micraster, were marine invertebrates related to modern sea urchins. Over time, the original calcite skeletons were dissolved and replaced by silica to form the hard flint fossils we find today.

These echinoids are famed for their distinct five-point symmetry and domed shape, often resembling a crown or star. Flint echinoids are a sought-after classic British fossil due to their excellent preservation, high contrast appearance, and regional collectability.

This specimen was discovered by our own team members, Alister and Alison, on 24 March 2025, and has been expertly cleaned, prepped, and treated by Alison for optimal presentation and preservation.

Item Details:

Name: Flint Echinoid (likely Conulus sp.)

Type: Sea Urchin Fossil (Echinoidea)

Common Name: Shepherd’s Crown

Age: Cretaceous Period (~100–66 million years ago)

Geological Formation: Chalk

Location Found: Seaford Head, Sussex, UK

Scale Reference: Scale Rule Squares / Cube = 1cm (please refer to photo for full sizing)

Certificate of Authenticity: Included

ACTUAL AS SEEN:

The image shows the exact specimen you will receive. Each fossil is carefully hand-selected and photographed to ensure quality and transparency.

Please Note:

Some fossils may be propped up for photography.

Colouration may vary slightly under different lighting or screens.

Sizes are approximate due to natural variations in shape.

Once sold, this listing will be updated with a new fossil and image.

100% Genuine – Professionally Prepared – Certificate of Authenticity Included

[ukge]

Fossils from St Margaret’s Bay, Kent

Flavia Faedo (UK) Fig. 1. View of St Margaret’s Bay, east. Situated on the east coast of Kent, between Dover and Deal, St Margaret’s Bay (Fig. 1) is a picturesque location offering a pleasant coastal walk as well as chalk cliffs and flint pebbles for the lover of Cretaceous fossils and geology. There are benches here to sit on and relax while contemplating the sea, and a lawn suitable for…

[echinoid-fossils-on-the-rocks]

Coeloptychium agaricoides an typical hexactinal six rayed spicular formed sponge of the Cretaceous, ironically the reference find of that sponge from the NHM was located also in Germany not too far away.

My small piece of the sponge fossil looks alike. Hope it is correct with the genus and identification.

I have not yet found an identification about the intact large fist sized other one in gray flint in the mug. The big like an petrified sunflower.

One image referenced it as an Aphrocallistes sponge but I’m not sure.

So i doing now an little bit of research on my sponge & coral finds of fossils from this year. With the better option of technology use of data sharing, with help of better visual search of descriptions and images, i think i have an good match now of one sponges of the Cretaceous era.

The visual search helped and leads to the database from the 🇬🇧 UKs Natural History Museum of the archive and maybe exhibitions from the sponge collection with over 71,000 catalogued specimens dated and figured 200 types of sponge specimens. So insane fascinating. Thanks to their works & catalogue.

But unsure who the sponge archive is actually located in South Kensington or Museum at Tring. 🫤

Anyway I copy the link here for reference. The database is huge with documentary and photos, takes time to load in the browser with all this images.

Collection specimens - Specimens - Data Portal

Collection specimens - Specimens - Data Portal

[earthstory]

Calcite concretion

Concretions are hard lumps found in sedimentary rock and often confused with fossils. They form during the long complex set of processes known under the umbrella term diagenesis, whereby the deposited sediments gradually turn into rock as more and more sediments pile up above increasing the pressure and temperature below. This process is further complicated by expulsion of water, and the passage of mineral rich waters deep under the sedimentary stack.

These waters often precipitate mineral cement, that binds the initial grains together, usually formed of silica or calcite depending on the chemistry of the original waters. When large amounts of the cement precipitate in one area, or around a nucleus, a concretion forms. Nodules are similar, but the cement replaces something for example in opalised fossils (see http://tinyurl.com/nms2zmd).

They are often egg shaped or spherical, making this example unusual, and the name comes from the Latin words con crescere, literally to grow with. They form early in diagenesis, before the sediment turns onto rock, and are usually harder than the surrounding rock, weathering out into ball rich surface layers. The nucleus is often a fossil, and collectors routinely break them open, hoping to find treasure within.

Calcite concretions like this one often form when bacteria reduce sulphates in the anoxic buried sediments. They mostly occur in mudstones and sandstones, often concentrated in layers along bedding planes, such as the flint nodules commonly found in the Cretaceous chalk of England and France (see http://tinyurl.com/d578uuz).

Loz

Image credit: Heritage Auctions

http://www.priweb.org/ed/concretions.htm geology.about.com/od/more_sedrocks/ig/concretionpics/

[hyperiontiles02]

limestone

Limestone is one of the most beautiful natural stones used for Limestone Floor Tiles, lthey are made from many different limestones from every corner of the Earth, but sometimes we don't notice the wonderful limestone formations right here, virtually on our own doorstep. The three most important limestone found in and around the United Kingdom are:1. Cretaceous era Limestone - 65-145 million years oldThese are the various chalks that dominate much of South East England, such as the North and South Downs. Chalk is a fine-grained white porous rock, composed from the fossilized remains of marine organisms. Chalk is generally too soft to be used for limestone floor tiles or any other building purposes, but is used a lot in the cement-making process. There are also many bands of Flint occurring throughout the rock formations. The most famous chalk formations in this area can be seen in the white cliffs around Dover.2. Jurassic era Limestone - 196-145 million years oldThese occur in and around the Cotswolds, with a pale brown colour, it is also know as "honey" or "Golden" limestone. They are much softer and more porous than the Carboniferous Limestone and occur in Limestone beds several metres thick. These are important as building stones, especially around the Cotswolds and they are sufficiently well formed to be used as freestones. They are not usually strong enough to be used in industrial construction, but are often pure and strong enough to be used for making Limestone Tiles.3. Carboniferous era Limestone - 299-359 million years oldThis is a solid and dense limestone rock of low porosity, and mainly occurring in thick beds. Carboniferous era Limestones have prominent vertical joints, they can be easily spilt into blocks for use as building stone, limestone floor tiles and limestone flooring. Carboniferous Limestone can be found widespread around the Peak District, Mendips and Yorkshire Dales. These type of Carboniferous limestone landscapes contain most of the potholes and natural cave systems in Great Britain. Carboniferous limestone is either a fine calcite mud, precipitated from warm shallow seas, or a shelly limestone, formed by fragments of animals such as corals and marine organisms. It is a very hard rock, and is commonly used for Limestone flooring and Limestone Tiles, but can also be used for cement making because it is often quite pure, and as a source of calcium carbonate for the chemical industry.

[forestkodama]

Florida is flattest state, followed by Illinois. Six states are flatter than Kansas, and all that pancake study showed was that pancakes are not flat.

Eastern Kansas has the absolutely gorgeous rolling Flint Hills formed under the shallow seas of the Permian, and because the rocky soils proved too difficult to farm, they were kept semi-intact.

Tallgrass Prairie National Preserve

Surprise bison.

Bonus lil horned lizard.

Even Western Kansas, which despite its gradual increasing elevation is as flat as Eastern Colorado, has fantastic topographic gems.

Little Jerusalem Badlands

Monument Rocks

This is super cool chalk prairie, formed when North America was divided by the Western Interior Sea during the Cretaceous.

I live and work in forests and mountains, but the prairie never fails to delight. It's beauty is subtle, not easily seen by car. It's dancing grasses and small treasure troves of fossils. It's birdsong and insect choirs. Forests and mountains offer cathedrals of green; prairies offer oceans of grass and flowers. Sobbing into the wind on a prairie hilltop, feeling as if you could be lifted off and swept away is an cathartic experience, 10/10 would recommend.

Have a pic of a horizon guaranteed to make the mountain folk nervous.

Compared to Kansas, even Iowa is hilly.

[ticklyholly-blog]

New Post has been published on Casa Los jardines de Lola

New Post has been published on http://www.casalosjardines.nl/main-points-on-limestone-paving/

Main Points on Limestone Paving

Limestone is one of the most beautiful natural stones used for Limestone Floor Tiles, lthey are made from many different limestones from every corner of the Earth, but sometimes we don’t notice the wonderful limestone formations right here, virtually on our own doorstep. The three most important limestone found in and around the United Kingdom are:

1. Cretaceous era Limestone – 65-145 million years old These are the various chalks that dominate much of South East England, such as the North and South Downs. Chalk is a fine-grained white porous rock, composed from the fossilized remains of marine organisms. Chalk is generally too soft to be used for limestone floor tiles or any other building purposes, but is used a lot in the cement-making process. There are also many bands of Flint occurring throughout the rock formations. The most famous chalk formations in this area can be seen in the white cliffs around Dover.

2. Jurassic era Limestone – 196-145 million years old These occur in and around the Cotswolds, with a pale brown colour, it is also know as “honey” or “Golden” limestone. They are much softer and more porous than the Carboniferous Limestone and occur in Limestone beds several metres thick. These are important as building stones, especially around the Cotswolds and they are sufficiently well formed to be used as freestones. They are not usually strong enough to be used in industrial construction, but are often pure and strong enough to be used for making Limestone Tiles. limestone has some nice tips on this.

3. Carboniferous era Limestone – 299-359 million years old This is a solid and dense limestone rock of low porosity, and mainly occurring in thick beds. Carboniferous era Limestones have prominent vertical joints, they can be easily spilt into blocks for use as building stone, limestone floor tiles and limestone flooring. Carboniferous Limestone can be found widespread around the Peak District, Mendips and Yorkshire Dales. These type of Carboniferous limestone landscapes contain most of the potholes and natural cave systems in Great Britain. Carboniferous limestone is either a fine calcite mud, precipitated from warm shallow seas, or a shelly limestone, formed by fragments of animals such as corals and marine organisms. It is a very hard rock, and is commonly used for Limestone flooring and Limestone Tiles, but can also be used for cement making because it is often quite pure, and as a source of calcium carbonate for the chemical industry.

[uk-fossils]

Fossil Flint Echinoid Conulus sp. (Sea Urchin, Shepherd's Crown) – Cretaceous Chalk, Seaton Devon UK – Authentic British Fossil with Certificate

This listing is for a beautifully preserved Fossil Flint Echinoid from the genus Conulus, colloquially known as a Shepherd’s Crown due to its distinctive pentagonal, crown-like shape. This fossil dates back to the Cretaceous Period (~145–66 million years ago) and was unearthed from the famous Cretaceous Chalk beds of Seaton, Devon, UK.

Conulus is an extinct genus of echinoid (sea urchin), a class of marine animals related to starfish and sea cucumbers. Echinoids once thrived on the seabed of warm, shallow seas that covered much of Europe during the Cretaceous. Over time, the silica from seawater replaced the original calcite shell, preserving the fossil within a flint nodule, often giving it a smooth and shiny appearance with excellent detail.

These echinoids have a rounded, dome-like test (shell) with fine ambulacral grooves and characteristic five-point symmetry—a key identifying feature of echinoderms. The name "Shepherd’s Crown" comes from the fossil’s shape, which resembles traditional shepherd headwear.

This specimen is part of a genuine British fossil heritage, ideal for collectors, educators, and nature enthusiasts alike.

Your specimen was discovered by our own team members Alister and Alison on 24 March 2025, and has been carefully cleaned, prepped, and treated by Alison to ensure both its beauty and preservation.

Item Details:

Name: Fossil Flint Echinoid (Shepherd's Crown)

Genus: Conulus sp.

Type: Echinoid (Sea Urchin)

Age: Cretaceous Period

Location Found: Seaton, Devon, UK

Geological Formation: Cretaceous Chalk

Scale Reference: Scale cube = 1cm (please see photo for full sizing)

Certificate of Authenticity: Included

ACTUAL AS SEEN: The image shows the exact specimen you will receive. Every fossil in our collection is hand-selected and professionally photographed for full transparency.

Please Note:

Some fossils may be gently propped for photography.

Colour may vary slightly due to lighting and device displays.

Measurements are approximate due to natural fossil shapes.

Once this item is sold, the listing will be updated with a new, carefully selected specimen.

100% Genuine Fossil – Professionally Selected – Certificate of Authenticity Included

[fenglichina-blog]

Chalk Industrial Grinding Machine

Chalk is a soft, white, porous sedimentary carbonate rock, a form of limestone composed of the mineral calcite. Calcite is calcium carbonate or CaCO3. It forms under reasonably deep marine conditions from the gradual accumulation of minute calcite shells (coccoliths) shed from micro-organisms called coccolithophores. Flint (a type of chert unique to chalk) is very common as bands parallel to the bedding or as nodules embedded in chalk. It is probably derived from sponge spicules or other siliceous organisms as water is expelled upwards during compaction. Flint is often deposited around larger fossils such as Echinoidea which may be silicified (i.e. replaced molecule by molecule by flint).

Chalk as seen in Cretaceous deposits of Western Europe is unusual among sedimentary limestones in the thickness of the beds. Most cliffs of chalk have very few obvious bedding planes unlike most thick sequences of limestone such as the Carboniferous Limestone or the Jurassic oolitic limestones. This presumably indicates very stable conditions over tens of millions of years.

Chalk Industrial Grinding Machine can be used to grind barite, calcite, kalium, steatite, marble, glass, feldspar, etc. superfine grinding mill is widely used in the metallurgy, building, chemical industry, and mining field..

Chalk Industrial Grinding Machine Suppliers

Depending on the producing and researching experiences of decades, Fujian Fengli Machinery has become a major ultrafine powder processing equipment manufacturer and export base.

TEL: +86-597-2285225 FAX: +86-597-2285185 Office Add: Y68# Longzhou Industrial Park Industrial West Road Xinluo District Longyan 364000 Fujian China Postcode: 364000 Email: sales2@fengli-china.com

You may also like read more about Chalk Industrial Grinding Machine at http://www.fengli-china.com.

[uk-fossils]

Fossil Flint Echinoid Conulus sp. (Sea Urchin, Shepherd's Crown) – Cretaceous Chalk, Seaton Devon UK – Authentic British Fossil with Certificate

This listing is for a beautifully preserved Fossil Flint Echinoid from the genus Conulus, colloquially known as a Shepherd’s Crown due to its distinctive pentagonal, crown-like shape. This fossil dates back to the Cretaceous Period (~145–66 million years ago) and was unearthed from the famous Cretaceous Chalk beds of Seaton, Devon, UK.

Conulus is an extinct genus of echinoid (sea urchin), a class of marine animals related to starfish and sea cucumbers. Echinoids once thrived on the seabed of warm, shallow seas that covered much of Europe during the Cretaceous. Over time, the silica from seawater replaced the original calcite shell, preserving the fossil within a flint nodule, often giving it a smooth and shiny appearance with excellent detail.

These echinoids have a rounded, dome-like test (shell) with fine ambulacral grooves and characteristic five-point symmetry—a key identifying feature of echinoderms. The name "Shepherd’s Crown" comes from the fossil’s shape, which resembles traditional shepherd headwear.

This specimen is part of a genuine British fossil heritage, ideal for collectors, educators, and nature enthusiasts alike.

Your specimen was discovered by our own team members Alister and Alison on 24 March 2025, and has been carefully cleaned, prepped, and treated by Alison to ensure both its beauty and preservation.

Item Details:

Name: Fossil Flint Echinoid (Shepherd's Crown)

Genus: Conulus sp.

Type: Echinoid (Sea Urchin)

Age: Cretaceous Period

Location Found: Seaton, Devon, UK

Geological Formation: Cretaceous Chalk

Scale Reference: Scale cube = 1cm (please see photo for full sizing)

Certificate of Authenticity: Included

ACTUAL AS SEEN: The image shows the exact specimen you will receive. Every fossil in our collection is hand-selected and professionally photographed for full transparency.

Please Note:

Some fossils may be gently propped for photography.

Colour may vary slightly due to lighting and device displays.

Measurements are approximate due to natural fossil shapes.

Once this item is sold, the listing will be updated with a new, carefully selected specimen.

100% Genuine Fossil – Professionally Selected – Certificate of Authenticity Included

[uk-fossils]

Fossil Flint Echinoid Sea Urchin (Shepherd’s Crown) – Cretaceous Chalk Fossil – Seaton Devon UK – With Certificate of Authenticity

This genuine Flint Echinoid Fossil (Shepherd’s Crown) comes from the Cretaceous Chalk deposits of Seaton, Devon, UK and is a stunning relic of Britain's prehistoric marine life. Echinoids, also known as sea urchins, were marine invertebrates that have existed for over 450 million years. This particular fossil dates back to the Cretaceous Period, approximately 100 million years ago, a time when much of what is now the UK was covered by warm shallow seas.

The name "Shepherd's Crown" comes from the distinctive star-shaped pattern often visible on the top surface of the fossil. These patterns are the preserved remains of the ambulacra – grooves through which the living animal's tube feet would have extended. This beautiful fossil formed when the original echinoid skeleton was replaced by silica over millions of years, producing the flint fossil preserved today.

This specimen was personally discovered by our expert team members Alister and Alison on 24 March 2025, and has since been carefully cleaned, prepped, and treated by Alison to ensure the highest display quality. It comes complete with a Certificate of Authenticity, guaranteeing it as a 100% genuine fossil.

Item Details:

Name: Echinoid (Sea Urchin, "Shepherd’s Crown")

Type: Flint Echinoid Fossil

Geological Age: Cretaceous Period

Formation: Chalk

Location Found: Seaton, Devon, United Kingdom

Discovery Date: 24 March 2025

Discovered & Prepared By: Alister and Alison

Scale Cube Reference: 1cm (see photos for full sizing)

Certificate of Authenticity: Included

ACTUAL AS SEEN: The image shown is of the exact specimen you will receive. Each fossil is hand-selected and photographed individually to ensure accuracy.

Please Note:

Some fossils may be propped up for photography purposes.

Colours may vary slightly depending on lighting, device screens, and photography settings.

Measurements are as accurate as possible but may vary slightly due to natural irregularities.

Once sold, this listing will be updated with a new, individually photographed replacement specimen.

Add a stunning piece of British natural history to your fossil collection today!

[uk-fossils]

Fossil Sponge in Flint – Cretaceous Grey Chalk Subgroup, Branscombe Dorset UK – w/ COA

Discover a rare and fascinating Fossil Sponge preserved in Flint, found within the Grey Chalk Subgroup of the Cretaceous period, from the historic coastal region of Branscombe, Dorset, UK. This specimen is 100% genuine, comes with a Certificate of Authenticity, and was discovered by our own team members, Alister and Alison, on 20 March 2025. It has been carefully cleaned, prepped, and treated by Alison, ensuring both scientific value and visual appeal.

Sponges are one of the oldest multicellular life forms on Earth, and fossil examples provide invaluable insight into early marine ecosystems. This particular fossil dates back to the Late Cretaceous, approximately 85–100 million years ago, when the region that is now Dorset was submerged under warm, shallow seas. The Grey Chalk Subgroup, part of the Upper Cretaceous sedimentary layers, is known for preserving marine fossils in flint nodules formed within chalk beds.

This beautifully preserved specimen captures the structure and texture of an ancient sponge, preserved through mineral replacement within a durable flint matrix. Fossils like this are sought after by collectors and geologists alike for their rarity and educational value.

This is a carefully selected, one-of-a-kind specimen, and the exact fossil shown in the listing photos is the one you will receive. A 1cm scale cube is included in the images for size reference—please refer to the photos for full dimensions.

Why Choose This Fossil? ✔️ Authentic Cretaceous Fossil Sponge in Flint from Branscombe, Dorset, UK

✔️ Discovered by Our Team – Alister and Alison – on 20 March 2025

✔️ Professionally Cleaned, Prepped, and Treated by Alison

✔️ 100% Genuine with Certificate of Authenticity

✔️ Perfect for Collectors, Educators, and Natural History Displays

✔️ Exact Fossil Shown – No Substitutes

✔️ Fast & Secure Shipping

Add a rare glimpse of Britain’s ancient marine life to your collection—order this unique Fossil Sponge in Flint today!

[uk-fossils]

Fossil Sponge in Flint – Cretaceous Grey Chalk Subgroup, Branscombe Dorset UK – w/ COA

Discover a rare and fascinating Fossil Sponge preserved in Flint, found within the Grey Chalk Subgroup of the Cretaceous period, from the historic coastal region of Branscombe, Dorset, UK. This specimen is 100% genuine, comes with a Certificate of Authenticity, and was discovered by our own team members, Alister and Alison, on 20 March 2025. It has been carefully cleaned, prepped, and treated by Alison, ensuring both scientific value and visual appeal.

Sponges are one of the oldest multicellular life forms on Earth, and fossil examples provide invaluable insight into early marine ecosystems. This particular fossil dates back to the Late Cretaceous, approximately 85–100 million years ago, when the region that is now Dorset was submerged under warm, shallow seas. The Grey Chalk Subgroup, part of the Upper Cretaceous sedimentary layers, is known for preserving marine fossils in flint nodules formed within chalk beds.

This beautifully preserved specimen captures the structure and texture of an ancient sponge, preserved through mineral replacement within a durable flint matrix. Fossils like this are sought after by collectors and geologists alike for their rarity and educational value.

This is a carefully selected, one-of-a-kind specimen, and the exact fossil shown in the listing photos is the one you will receive. A 1cm scale cube is included in the images for size reference—please refer to the photos for full dimensions.

Why Choose This Fossil? ✔️ Authentic Cretaceous Fossil Sponge in Flint from Branscombe, Dorset, UK

✔️ Discovered by Our Team – Alister and Alison – on 20 March 2025

✔️ Professionally Cleaned, Prepped, and Treated by Alison

✔️ 100% Genuine with Certificate of Authenticity

✔️ Perfect for Collectors, Educators, and Natural History Displays

✔️ Exact Fossil Shown – No Substitutes

✔️ Fast & Secure Shipping

Add a rare glimpse of Britain’s ancient marine life to your collection—order this unique Fossil Sponge in Flint today!

[uk-fossils]

Fossil Sponge in Flint – Cretaceous Grey Chalk Subgroup, Branscombe Dorset UK – w/ COA

Discover a rare and fascinating Fossil Sponge preserved in Flint, found within the Grey Chalk Subgroup of the Cretaceous period, from the historic coastal region of Branscombe, Dorset, UK. This specimen is 100% genuine, comes with a Certificate of Authenticity, and was discovered by our own team members, Alister and Alison, on 20 March 2025. It has been carefully cleaned, prepped, and treated by Alison, ensuring both scientific value and visual appeal.

Sponges are one of the oldest multicellular life forms on Earth, and fossil examples provide invaluable insight into early marine ecosystems. This particular fossil dates back to the Late Cretaceous, approximately 85–100 million years ago, when the region that is now Dorset was submerged under warm, shallow seas. The Grey Chalk Subgroup, part of the Upper Cretaceous sedimentary layers, is known for preserving marine fossils in flint nodules formed within chalk beds.

This beautifully preserved specimen captures the structure and texture of an ancient sponge, preserved through mineral replacement within a durable flint matrix. Fossils like this are sought after by collectors and geologists alike for their rarity and educational value.

This is a carefully selected, one-of-a-kind specimen, and the exact fossil shown in the listing photos is the one you will receive. A 1cm scale cube is included in the images for size reference—please refer to the photos for full dimensions.

Why Choose This Fossil? ✔️ Authentic Cretaceous Fossil Sponge in Flint from Branscombe, Dorset, UK

✔️ Discovered by Our Team – Alister and Alison – on 20 March 2025

✔️ Professionally Cleaned, Prepped, and Treated by Alison

✔️ 100% Genuine with Certificate of Authenticity

✔️ Perfect for Collectors, Educators, and Natural History Displays

✔️ Exact Fossil Shown – No Substitutes

✔️ Fast & Secure Shipping

Add a rare glimpse of Britain’s ancient marine life to your collection—order this unique Fossil Sponge in Flint today!

[uk-fossils]

Fossil Sponge in Flint – Cretaceous Grey Chalk Subgroup, Branscombe Dorset UK – w/ COA

Discover a rare and fascinating Fossil Sponge preserved in Flint, found within the Grey Chalk Subgroup of the Cretaceous period, from the historic coastal region of Branscombe, Dorset, UK. This specimen is 100% genuine, comes with a Certificate of Authenticity, and was discovered by our own team members, Alister and Alison, on 20 March 2025. It has been carefully cleaned, prepped, and treated by Alison, ensuring both scientific value and visual appeal.

Sponges are one of the oldest multicellular life forms on Earth, and fossil examples provide invaluable insight into early marine ecosystems. This particular fossil dates back to the Late Cretaceous, approximately 85–100 million years ago, when the region that is now Dorset was submerged under warm, shallow seas. The Grey Chalk Subgroup, part of the Upper Cretaceous sedimentary layers, is known for preserving marine fossils in flint nodules formed within chalk beds.

This beautifully preserved specimen captures the structure and texture of an ancient sponge, preserved through mineral replacement within a durable flint matrix. Fossils like this are sought after by collectors and geologists alike for their rarity and educational value.

This is a carefully selected, one-of-a-kind specimen, and the exact fossil shown in the listing photos is the one you will receive. A 1cm scale cube is included in the images for size reference—please refer to the photos for full dimensions.

Why Choose This Fossil? ✔️ Authentic Cretaceous Fossil Sponge in Flint from Branscombe, Dorset, UK

✔️ Discovered by Our Team – Alister and Alison – on 20 March 2025

✔️ Professionally Cleaned, Prepped, and Treated by Alison

✔️ 100% Genuine with Certificate of Authenticity

✔️ Perfect for Collectors, Educators, and Natural History Displays

✔️ Exact Fossil Shown – No Substitutes

✔️ Fast & Secure Shipping

Add a rare glimpse of Britain’s ancient marine life to your collection—order this unique Fossil Sponge in Flint today!

[uk-fossils]

Fossil Sponge in Flint – Cretaceous Grey Chalk Subgroup, Branscombe Dorset UK – w/ COA

Discover a rare and fascinating Fossil Sponge preserved in Flint, found within the Grey Chalk Subgroup of the Cretaceous period, from the historic coastal region of Branscombe, Dorset, UK. This specimen is 100% genuine, comes with a Certificate of Authenticity, and was discovered by our own team members, Alister and Alison, on 20 March 2025. It has been carefully cleaned, prepped, and treated by Alison, ensuring both scientific value and visual appeal.

Sponges are one of the oldest multicellular life forms on Earth, and fossil examples provide invaluable insight into early marine ecosystems. This particular fossil dates back to the Late Cretaceous, approximately 85–100 million years ago, when the region that is now Dorset was submerged under warm, shallow seas. The Grey Chalk Subgroup, part of the Upper Cretaceous sedimentary layers, is known for preserving marine fossils in flint nodules formed within chalk beds.

This beautifully preserved specimen captures the structure and texture of an ancient sponge, preserved through mineral replacement within a durable flint matrix. Fossils like this are sought after by collectors and geologists alike for their rarity and educational value.

This is a carefully selected, one-of-a-kind specimen, and the exact fossil shown in the listing photos is the one you will receive. A 1cm scale cube is included in the images for size reference—please refer to the photos for full dimensions.

Why Choose This Fossil? ✔️ Authentic Cretaceous Fossil Sponge in Flint from Branscombe, Dorset, UK

✔️ Discovered by Our Team – Alister and Alison – on 20 March 2025

✔️ Professionally Cleaned, Prepped, and Treated by Alison

✔️ 100% Genuine with Certificate of Authenticity

✔️ Perfect for Collectors, Educators, and Natural History Displays

✔️ Exact Fossil Shown – No Substitutes

✔️ Fast & Secure Shipping

Add a rare glimpse of Britain’s ancient marine life to your collection—order this unique Fossil Sponge in Flint today!