#oolitic limestone fossil

[uk-fossils]

CLYPEUS MULLERI Fossil Echinoid Sea Urchin Jurassic Inferior Oolite Wiltshire UK Authentic Specimen

This listing features a beautifully preserved fossil echinoid (sea urchin) of the species Clypeus mulleri, discovered in the Inferior Oolite Formation of Wiltshire, UK. This authentic Jurassic marine fossil is accompanied by a Certificate of Authenticity, and the photograph shows the actual specimen you will receive.

Clypeus mulleri is a well-known echinoid species from the Middle Jurassic and is part of the:

Order: Clypeasteroida

Family: Clypeidae

This echinoid lived during the Bajocian Stage of the Middle Jurassic Period, around 170–168 million years ago. The Inferior Oolite represents shallow marine environments, including oolitic and bioclastic limestones deposited in a warm, tropical sea.

Fossils from the oolite beds of Wiltshire are prized for their fine preservation and historical importance, with Clypeus mulleri being among the most characteristic species.

Morphological Features:

Large, rounded disc-shaped test with a slight central elevation

Petaloid ambulacra forming a five-petaled pattern on the upper surface

Fine radial symmetry with a smooth or lightly ornamented surface

Central peristome (mouth area) on the underside, typical of regular echinoids

These echinoids likely lived on or slightly buried in the sea floor, using tube feet for feeding and respiration.

Specimen Details:

Species: Clypeus mulleri

Fossil Type: Echinoid (Sea Urchin) Test

Geological Unit: Inferior Oolite Formation

Geological Age: Middle Jurassic (Bajocian Stage)

Location: Wiltshire, United Kingdom

Depositional Environment: Shallow warm marine platform (oolitic limestone)

Family: Clypeidae

This is a genuine and attractive example of a classic British Jurassic echinoid, perfect for fossil collectors, educators, or natural history enthusiasts.

Scale rule squares/cube = 1cm. Please see the photo for full sizing and details.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

[hillsofgrace]

coral reef fossils

[peasthedumb]

Yo, I’m reaching out to geology tumblr for help with a cool rock (context + info below)

Went on a trip for my geology course recently and found 2 samples of this rock. The first one the guy who ran the trip took for himself because he wanted to figure it out, and I took the one above.

Was found on a coast, seems like a poor/moderately sorted oolitic limestone with a few tiny fossils in, but it’s the calcite (idk what to call that.Veins?) he said he wasn’t sure about,he said he had no idea why it’s doing that pattern.

In my (not at all) expert eye, it looks like this rock includes at least a couple other rock fragments in it, because there’s one segment in here that’s got a completely different grain size and is isolated to a small circle, but it’s still oolitic. (Pic below) Is that right or is the rock just like that

And, I’m assuming it’s just to do with the erosion cause it was on a beach, but I may as well ask. How come some parts look completely smooth whilst other parts (mainly around the calcite veins) actually shows the ooliths?

Pls go easy on me if I’m a dumbass btw, I’m still a beginner in geology. And sorry for the godawful camera quality.

[rajasthanlime]

Choosing the Right Limestone: A Comprehensive Guide

Limestone is among the most adaptable natural stones, and has applications in everything from agriculture to construction and industry. If you're looking to use it to construct structures as well as manufacturing or landscaping, picking the right limestone is vital for ensuring durability, function and aesthetic appeal. This guide will take you through the essentials you should know about choosing limestone and its properties, from understanding their characteristics to locating the most suitable suppliers to meet your needs.

Understanding Limestone: Composition and Types

Limestone, a rock that is sedimentary in nature mostly composed from calcium carbonate (CaCO3). In time pressure, an accumulation of organic material such as shells, coral and algae change into limestone. This natural process provides limestone with its unique durability and adaptability in a variety of environments.

Limestone is available in a variety of forms that each have distinct characteristics. The most frequently utilized varieties are:

Chalk The chalk is soft and porous and frequently used in agriculture to enhance soil quality.

Travertine An even denser limestone, used primarily for flooring and also as a building material.

Oolitic limestone The limestone is recognized for its rough texture, this kind of limestone is very popular in the field of architecture.

Fossiliferous limestone It is a visible fossil which add a nice touch to any design, whether indoors or out.

The limestone type you select will depend on the requirements of your project, for example, load-bearing capacity or durability to the weather or aesthetics.

Key Factors to Consider When Choosing Limestone

When choosing the right limestone for a project, there are a number of variables that must be considered:

Durability and Strength

The strength of limestone is what makes it an ideal material for industrial and construction. But not all kinds are equally durable. For instance, travertine and Oolitic limestone are renowned for their strength, which makes them ideal for applications that require a lot of force like bridges, facades or building structures.

It is essential to determine the strength of the limestone's compressive force particularly if you plan to utilize it in areas subject to high loads or extreme weather conditions. An understanding of your project's requirements will assist you in selecting a limestone variety that is compatible with the required strength requirements.

Porosity and Water Resistance

It is natural that limestone has pores meaning it is able to absorb water. This makes it essential to think about the porosity of the limestone when choosing it for outdoor work or in areas that are susceptible to exposure to moisture. A limestone that is extremely porous could lead to water permeability, which could cause permanent damage.

To alleviate this issue, certain limestones is sealed to improve its resistance to water. However, if exposure to water is a issue, choosing a more dense type of limestone, like the travertine variety, could be an option that is more durable.

Color and Aesthetic Appeal

One of the main reasons that limestone continues to be so popular is the variety of colors, ranging from creamy whites and soft shades to dark browns and grays. The appearance of the stone can greatly affect the overall aesthetics of your home.

Before you choose limestone, take into consideration its consistency in color the veining and the texture. Certain kinds of limestone possess an appearance that is more uniform and others are heavily veined and have intricate designs. Pick a type that fits with your style regardless of whether you're looking for a modern, minimalist style as well as a traditional rustic style.

3. Finding Reliable Limestone Suppliers

It is important to note that the quality of limestone you purchase is determined by the company you buy it from. By working with reputable limestone suppliers india guarantees that you get top-quality limestone for any project as well as accurate advice and assistance.

India is among the top limestone producers, and offers an array of limestone varieties to meet a variety of demands. If you're in construction or manufacturing, or agriculture, a reliable provider can help you choose the best limestone and ensure that it conforms to industry standards for durability, strength and aesthetics.

4. Limestone Applications: Choosing the Right Type for Your Needs

Based on the purpose of your project and the limestone you select can greatly impact the performance and durability. Here are a few common applications and the types of limestone that are the best for them:

Construction and Architecture

When it comes to building structures such as walls, facades and bridges, choosing a durable solid and sturdy limestone essential. Travertine and Oolitic limestone are great options due to their superior load-bearing capability and attractive appearance.

Landscaping

If you're planning to use limestone to create landscaping features for example, like creating paths, walls for retaining, or other garden features, you'll need an option that is not only tough but will also enhance the natural landscape. Limestone that has deep textures, rich texture and earthy colors can be used to add visual attraction to any landscape.

Industrial Use

Limestone is used extensively in a variety of industries like making steel and cement as well as water treatment. In these situations the chemical characteristics of limestone are far more crucial as is its physical appearance. Be in close contact with the lime suppliers in jodhpur who are experts in providing industrial-grade limestone to ensure that you get the appropriate grade and kind for your particular needs.

Agriculture

The limestone used in agriculture, commonly called aglime is utilized to neutralize soil acidity and enhance its fertility. The limestone used to achieve this is usually crushed into fine powder. The most popular choice of chalk limestone for agricultural use because of its calcium content as well as its ability to rapidly modify soil's pH.

5. Sustainability and Environmental Considerations

Limestone is a natural and green material, making it an environmentally sustainable option for a variety of applications. But, it is crucial to take into account the environmental impact on limestone processing and extraction. Quarrying may impact the landscape as well as local ecosystems. Hence, sourcing from eco-friendly lime supplier in Rajasthan is an essential measure to reduce the ecological footprint of your project.

Most reliable suppliers employ sustainable quarrying practices and provide the limestone that is mined and processed in an environmentally-friendly method. They can also offer certifications or other information regarding the quarry's history, assuring that it is compatible with your sustainable goals.

6. Final Thoughts on Choosing the Right Limestone

The selection of the best limestone for your project requires more than simply selecting a stone that looks attractive. It is important to carefully consider elements like durability, porosity, as well as appropriateness for your particular use case. If you are aware of the various types of limestone, and working with reliable suppliers you can be sure that your limestone will meet the requirements of both aesthetic and functional.

[deathifu]

Discovering sandstone exporter in India

Basalt Stone Exporter From India Historically, limestone has been prized for its versatile applications across civilizations. Since ancient times, limestone has played a crucial role in construction, architecture, and art. For instance, Runjhun Export, a prominent name among limestone exporters in India, highlights its enduring use in monumental structures like the Great Pyramids of Giza and the Parthenon in Greece. These iconic landmarks exemplify limestone's durability and aesthetic appeal, showcasing its role as a preferred building material for millennia.

Aside from monumental architecture, limestone has been used in everyday structures such as dwellings, forts, and temples due to its abundance, simplicity of quarrying, and workability. In medieval Europe, limestone was commonly used in Gothic cathedrals because of its capacity to be intricately carved into elaborate façade and decorative sculptures. The Renaissance period saw a resurgence in its use for palaces and public structures throughout Europe, indicating a return to classical architectural traditions.

Furthermore, limestone's utility extends beyond construction; it has been used in lime manufacturing for mortar and plaster, extending the life of structures by aiding in waterproofing and stability. Its use in the production of lime-based paints and pigments has also left an indelible effect on art history, with limestone serving as a foundation for the brilliant colors found in ancient frescoes and Renaissance paintings.

Sandstone Exporter In India, a famous limestone exporter in India, deals in several varieties known for their diverse compositions and applications. One typical variety is chalk, which is distinguished by its softness and high calcium carbonate content. Because of its powdery consistency, chalkboards, and agricultural lime are frequently made from it.

Marble, another notable variety, is formed by recrystallizing limestone under extreme heat and pressure, resulting in a polished surface suitable for sculptures and architectural features.

Travertine, which is typically found in natural springs and caves, has a porous structure that makes it ideal for building facades and floors.

Oolitic limestone is distinguished by its characteristic spherical grains, which form in shallow, warm sea waters and are utilized as a decorative or construction material.

Finally, fossiliferous limestone contains visible fossil remnants, providing insights into ancient marine life and serving as an intriguing choice for ornamental and educational exhibits. Each species of limestone differs not only in look and texture, but also in suitability for certain industrial, artistic, and architectural applications, making limestone a diverse and important natural resource worldwide.

Indian basalt stone exporters like Runjhun Export offer a variety of customization options to meet diverse customer needs and preferences. These options typically include:

Limestone is a sedimentary limestone that is widely used in many different industries and construction projects around the world.

First and foremost, a lot of structures, roads, and bridges are constructed using limestone. Because of its strength and resistance to weathering, it's perfect for building long-lasting facades and foundations.

Limestone is an essential component used in the creation of cement, concrete, and mortar. Its high calcium content gives it vital binding qualities that support these materials' stability and strength.

In the steel industry, limestone is also essential for cleaning molten iron and eliminating impurities during the refining process. This improves the finished steel product's strength and quality.

Limestone is also highly valued in agriculture because it helps to balance acidic soils and gives crops vital elements like calcium, which enhances crop quality and productivity.

Runjhun Export, a well-known limestone exporter from India, specializes in providing premium limestone that satisfies exacting international criteria for strength, purity, and uniformity. Their knowledge makes them a dependable partner in the international market by guaranteeing trustworthy sourcing for industrial and construction projects everywhere.

In conclusion, limestone's adaptability in steel production, building, manufacturing, and agriculture highlights its significance as a basic resource promoting sustainable growth and economic development across industries.

Limestone Exporters In India Customers can typically define the dimensions and shapes of basalt stones they need, ranging from standard sizes to custom cuts and profiles. Runjhun Export, for example, can handle demands for a variety of dimensions to meet specific project specifications.

Finish: Exporters offer different finishes such as polished, honed, brushed, flamed, or natural cleft surfaces. This allows customers to choose the desired texture and appearance of the basalt stone, ensuring it complements their aesthetic preferences and functional requirements.

Color and Pattern: While basalt stone typically ranges from gray to black, exporters such as Runjhun Export may offer variances in color intensity and pattern within the stone. Customers can use this customization to select stones that complement the design theme of their project or to create unique visual effects.

[wh00psramblings]

oolitic limestone......bc ooids.....just funky lil things (also i am a fan of almost any marine sediment....the fossils are cool okay)

in terms of minerals? depends. lab wise? quartz bc its easy to identify and the abundance of it can be a good indicator for a fair few rocks. memorability? orthoclase bc my geology lecturer referred to it as 'horse flesh' which my peers have told me is weird but its in my brain now!

Wish people would randomly send me pictures of their favorite rocks/minerals and tell me why it’s their favorite

[geologyjohnson]

This middle #Jurassic #coral tho, outside Wolfson hall @stedmundhall #oxford #oolite #limestone #GeologyJohnson #geology #fossils #palaeontology (at Oxford University Museum of Natural History) https://www.instagram.com/p/B3ZcQxWp98-/?igshid=1rvu5plsb3r1y

[my-name-is-dahlia]

Vocabulary (pt.dcccxi)

Words related to sedimentary and metamorphic rocks taken from Children's Encyclopedia of Rocks and Fossils (2019) by Claudia Martin:

sedimentary (adj.) of or like sediment.

claystone (n.) hardened clay. Some geologists further restrict the term to a sedimentary rock that is composed primarily of clay-sized particles (less than 1/256 millimetre in diameter) and is not laminated or easily split into thin layers; such rocks that show cleavage roughly parallel to the bedding plane often are classed as clay shales. [source]

conglomerate (n.) geology. a rock made up of small stones held together (compare with agglomerate).

dolostone (n.) rock consisting of dolomite.

coal (n.) a hard black or blackish substance, mainly carbonized plant matter, found in underground seams and used as a fuel and as a source of many organic chemicals.

oolite (n.) a sedimentary rock, usually limestone, consisting of rounded grains made up of of concentric layers.

siltstone (n.) a fine-grained sandstone consisting of consolidated silt.

metamorphic (adj.) of or marked by metamorphosis.

marble (n.) limestone in a metamorphic crystalline (or granular) state, and capable of taking a polish, used in sculpture and architecture.

hornfels (n.) a dark fine-grained metamorphic rock composed mainly of quartz, mica, and feldspar.

[neathnights]

'...I have attended a ball...'

'Or what passes for a ball in this appalling crypt. They can dance after a fashion: a pitiable shuffling, punctuated now and then by the partial disintegration of a dancer. The first time this happened it gave me quite a start. I shall not be wearing those shoes again. But one grows used to anything...'

→ 'I demonstrated all the latest dances...' 'The dead joined me in a frenzy of withered limbs!'

→ 'I spent the evening in a quiet corner.' '..It would not do to attract undue attention. Not now.'

'I chatted all evening with a collector of fossils about the textures of oolitic limestone. I think perhaps boredom is driving me to virtue.'

[neptunesdaughtr]

The grounds of Coral Castle consist of 1,100 short tons (1,000 t) of stones in the form of walls, carvings, furniture, and a castle tower. Commonly mistakenly believed to be made of coral, it is actually made of oolite, also known as oolitic limestone. Oolite is a sedimentary rock composed of small spherical grains of concentrically layered carbonate that may include localized concentrations of fossil shells and coral. Oolite is found throughout southeastern Florida from Palm Beach County to the Florida Keys. Oolite is often found beneath only several inches of topsoil, such as at the Coral Castle site.

The stones are fastened together without mortar. They are set on top of each other using their weight to keep them together. The craftsmanship detail is so fine and the stones are connected with such precision that no light passes through the joints. The 8-foot tall vertical stones that make up the perimeter wall have a uniform height. Even with the passage of decades the stones have not shifted.

[geotourism]

Triassic Beds of Lake Lugano and Ticino In Switzerland

Lake Lugano Switzerland

Lake Lugano is a glacial lake in southern Switzerland and borders Italy. It is situated between the Alps and the Lepontine Alps in the canton of Ticino. The lake and surrounding area are popular tourist destinations, with many villas situated around the shores. The average water temperature at Lake Lugano is 10 degrees Celsius in the summer and 2 degrees Celsius in the winter. It has a surface area of 48.7 km² and a maximum depth of 288 m. The lake is fed by the River Ticino and has a drainage basin of 9,000 km². The main towns on the shores of the lake are Bellinzona, Lugano, Mendrisio, and Locarno. The lake is popular for its recreational activities such as boating, fishing, swimming, and windsurfing.

Popular Attractions on the Lake

Lake Lugano is a popular tourist destination in Switzerland. The lake is surrounded by mountains, making it a picturesque location. There are many popular attractions on the lake, including the Villa Diodati, the Botanical Garden, and the Villa Silvia. Lugano Mountain is the highest peak in the canton of Ticino and the highest point in Switzerland. The mountain is part of the Pennine Alps and is located in the municipality of Lugano. It has an elevation of 2,997 meters. Lake Lugano is known for its amazing views, and there are many top attractions located around the lake. Some of the top attractions include the Villa d’Este, the Villa Monastero, the Castelgrande, and the Botanical Garden.

Geology of the Area

The lake is 48.7 km2  in size, 63% of which is in Switzerland and 37% in Italy. It has a maximum width of about 3 km at the bay of Lugano. A maximum depth of 288 m is found in the northern basin.  The pyramid-shaped, wooded mountain of Monte San Giorgio is located beside Lake Lugano and is regarded as the best fossil record of marine life from the Triassic Period (nearly 245 million years ago). Diverse marine life flourished within this lagoon, including reptiles, fish, bivalves, ammonites, echinoderms, and crustaceans. The area comprises Triassic carbonate formations, mostly within the protected area, which outcrops between both older volcanic and more recent sedimentary formations of the Southern Alpine Series in the buffer zone.

Permian andesites and rhyolites of volcanic origin are exposed on the north face of lake Lugano. Jurassic limestone formations occur on the lower slopes which dip at the mountain foot under the sediments of the Po valley. The Middle Triassic sequence occurs in beds of limestone more than 1,000 m thick. The Triassic sequence includes conglomerate and sandstone (Bellano formation), reef limestone, dolomites and bituminous shales (Besano formation – the main fossil-bearing horizons), marls, limestones and gypsum (Pizzella marls), marine dolomites and dolomitized oolitic limestone (Tremona beds).

Activities on and around the Lake

Lake Lugano is a great destination for a lake vacation. It is surrounded by mountains, making for beautiful scenery. There are many popular Spots located around the lake, making it a great place to enjoy some recreation. Some of the most popular include swimming, boating, fishing, and hiking. A day trip to Lugano is a great way to enjoy the sights and sounds of the city without having to stay there overnight.

Also read- The Great Plains USA: History, Facts, Map And Geology

Morcote village

Morcote is a popular village located on the shores of Lake Lugano. There are many restaurants and shops located in the village. Morcote is also home to Morcote Castle, which is a popular tourist attraction. Apart from this Lugano villages include, Bellinzona, Cossonico, and Sarnico.

Lake Ticino, Switzerland

Lake Ticino is a large lake in the Swiss Alps and it is also the second deepest lake in Switzerland. The lake is popular for boating, swimming, fishing, and hiking. There are many places located around the lake, including the Finsteraarhorn, the Jungfrau Region, and the Seelisberg. It is surrounded by some of the most popular tourist attractions in the country. There are plenty of activities to enjoy on and around the lake, including swimming, hiking, boating, and skiing. The weather and temperature can vary depending on the time of year, so be sure to check the forecast before your visit.

[uk-fossils]

VERY RARE: Spiroceras bifurcati Fossil Heteromorph Ammonite – Inferior Oolite, Jurassic Coast, Burton Bradstock, Dorset, UK

Offering a highly rare and visually striking Spiroceras bifurcati heteromorph ammonite fossil from the Jurassic Coast, Burton Bradstock, Dorset, UK. This unique fossil specimen was excavated from the famous Inferior Oolite Formation, a classic Jurassic unit renowned for preserving a wide array of ammonite species in beautiful condition.

Geological Unit: Inferior Oolite Formation

Geological Period: Jurassic

Stage: Bajocian (Middle Jurassic)

Depositional Environment: Shallow marine carbonate platform

Order: Ammonitida

Superfamily: Stephanoceratoidea

Family: Hammatoceratidae

The Spiroceras bifurcati is a heteromorph ammonite known for its coiled and irregular shell morphology—a rarity among ammonites. The spiral and bifurcated whorls make it highly desirable for collectors and palaeontologists alike.

This rare specimen was collected on 30 April 2025 by our skilled fossil hunters, Alister and Alison. It has been expertly cleaned and conserved by Alison, maintaining the specimen’s authenticity and scientific integrity. The fossil remains embedded in its original limestone matrix.

The images show the actual fossil you will receive. A 1cm scale cube is shown for reference—please see all listing photos for full sizing details.

All of our Fossils are 100% Genuine Specimens & come with a Certificate of Authenticity.

A once-in-a-lifetime chance to own a rare Spiroceras bifurcati ammonite—perfect for discerning collectors, natural history enthusiasts, or as an educational centrepiece.

[earthstory]

The Bahamas from space. This group of 700 atolls and keys in the Atlantic are the tips of great banks poking out above the ocean surface. The bedrock is fossil coral, with lagoonal oolitic limestone derived from the erosion and precipitation of reefs and shells bedded above it. The highest point is only 63 metres above sea level. Only one river exists in the entire archipelago. The photo was snapped from the ISS by NASA astronaut Karen Nyberg. Loz

[bronzejarfly]

A western fence lizard (Sceloporus occidentalis) silently judges from its vantage point between two slabs of oolitic limestone in the White Mountains of Eastern California. The rocks belong to the Lower Cambrian Poleta Formation. Embedded within, barely visible in these images, are fossils of ancient photosynthetic sponges known as archaeocyatha. These primitive animals were the first organisms in Earth’s history to form framework reefs, millions of years before the first corals. 

The shallow equatorial sea where these sponges lived is long since dried up. Today the reef sits high in the mountains among the sagebrush and juniper, the haunt of lizards and ghosts, the rain and snow slowly weathering it from its half-billion-year-old tomb.

[janesnewweblog]

Fabulous fossils in the Chedworth area

OUGS field trip, 2 July 2017

‘The old people are coming!’ A cohort of urchins, busily engaged in childish activities in Stony Furlong Quarry, thus greeted the arrival of the OUGS Severnside branch’s finest as we began a study tour in the Chedworth area.

Dr Paul Olver led this sortie into the Middle Jurassic, taking in two sections of railway cutting of the Midland & South Western Junction Railway to follow the succession of outcrops from the Great Oolite series in the quarry, dating from around 165 million years ago, to the older exposures near the Roman Villa.

First on the agenda was a cup of tea and the chance for breakfast at the Denfurlong Farm Shop – well worth remembering for future visits to the area. Then it was off to the cutting for a spot of hands-on geology, with fossils aplenty to be found in the rocks.

The White Limestone in the quarry proved a rich hunting ground whilst providing evidence of a marine environment, with the lower (softer and browner) rocks showing a more brackish environment with less biodiversity.

The fossil finds ranged from brachiopods and echinoids, plus one beautiful fish vertebra, to gastropods and bivalves. My personal favourite was a tiny but very lovely gastropod revealed in a crumbly piece of limestone I was able to pull apart, showing the creature and the impression on the opposite piece of stone.

From there we abandoned the urchins to their foraging and departed en masse on a picturesque drive to the car park by the Roman Villa. Lunch was a very civilised affair in the café at the National Trust property, before the party headed up into the woods and the second stretch of cutting.

This section of older rock dated from the Inferior Oolite Group (inferior only in the sense of lying beneath the Great Oolite Group), with echinoid fragments being the main attraction at our first stop, the Clypeus Grit.

Over the afternoon the group walked the length of the cutting, stopping at 10 locations to look for fossils and examine features including a tufa waterfall and a normal fault.

For me, as a relative newcomer to geology in the field, this was a great opportunity to see geologists in action and to have a range of people to chat to and question. The leisurely pace gave everyone the chance to have a good go at finding fossils – pick of the bunch were the fish vertebra, a beautiful bivalve like a razor shell, thalassinoides and Trigonia costata, shaped like a tricorn hat and featuring three sides with varying ornamentation – and to ask questions.

Best of all was just being able to chat to other members of the group about OU studies, geological activities around the area and field trips to far-flung areas of the globe.

Thanks to Paul for leading an excellent outing, and to the branch for putting on such a day trip. I’ve now acquired my latest piece of kit, a geological hammer, so I’m all set for the next one.

[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.