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Coral Fossil

Fossils for Sale — Mon, 09 Feb 2009 19:19:01 +0000

It may surprise some to learn that corals can also become fossils, but in fact the oldest fossil corals are some 450 million years old, from the Ordovican period. Corals are polyps (having a body sac) and a skelleton that can become fossilised, and may live as individulas or as a colony of many polyps, eventually forming a coral reef. They are some of the most beautiful and colourful of all marine creatures and make fascinating fossils for any collection!

GORGEOUS RARE PURPLE SUN BLEACHED TIP TIDE POOL CORAL FOR SALTWATER TANK DISPLAY
US $62.88

52oz Rare south sea shape coral branch dyek230
US $9.99

Petosky Stones Fossil Coral Hexagonaria Devonian Fossils Lot
US $2.99

beautiful brain coral from the most beautiful beaches in the world Cozumel
US $75.00

Fossilized brain coral orange agatized nuggets Devonian West US 075 jl90
US $9.99

CRINOID FOSSIL STEMS CORAL IN MATRIX
US $4.00

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Coral Fossil

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Dinosaur Fossils For Sale

Fossils for Sale — Mon, 09 Feb 2009 15:46:18 +0000

When most people think of fossils they immediately think of complete dinosaur skeletons such as a giant T Rex, complete in all its details. The truth is that there are far more incomplete skeletons or mere fragments of dinosaur bone than complete skeletons out there. For most people and many collectors the thought of owning or finding a dinosaur fossil, even if only a small piece of bone is very exciting. But, beware fakes abound, so check out our fossil buyer's guide before taking the plunge!

So, if you want to own a genuine fossilised part of a dinosaur, check below!

Rare Triassic Keichousaurus Hui Dinosaur Reptile Fossil
US $137.77

Dinosaur tooth Late Cretaceous fossil tooth Mosasaurs
US $12.99

Fossilized Whale Vertebrae Megalodon Era Dinosaur Shark Tooth
US $7.99

Dactylioceras sp Jurassic Dinosaur Age Genuine Whitby Ammonite Fossil A4
US $1.56

Eleganticeras elegans Jurassic Dinosaur Age Genuine Whitby Ammonite Fossil J98
US $13.40

Dinosaur fossil egg HADROSAUR Dinosaur Cretaceous 75 million years aa2
US $1,099.99

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Dinosaur Fossils For Sale

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Trilobite Fossils For Sale

Fossils for Sale — Mon, 09 Feb 2009 14:43:49 +0000

After the ammonite, trilobites must be most commonly known and collected fossils. The trilobite is part of an extinct group of arthropods that lived in the sea over 350 million years ago. Trilobites existed during the Palaeozoic era from the lower Cambrian until the late Permian periods. They have no modern forms-95% of all marine life became extinct in the Permian extinction event, though they are closely related to crustaceans such as lobsters and crabs. In appearance the nearest living equivalent is probably the wood louse or pill bug, though this is obviously no relative however distant. The segmented body is however rather reminiscent of the trilobite. The name trilobite derives from the fact that the body of a trilobite can be divided in length three ways into two outer lobes and the central lobe. Trilobites had compound eyes like many crustaceans and insects do today and in fact the eyes of the trilobite are the most ancient visual perception system known. Like woodlice trilobites had the ability to roll up tucking their tails underneath them for protection and indeed some have been found fossilised in this state. There were many thousands of species of trilobites and most are about 2 to 10 cm in length but a few species grew to nearly 1 m in length.

Trilobites are favourite fossil for collectors easily available in common forms although some varieties are rare and consequently much sought-after. Have a look to see what is currently available to buy below:

Eurypterid trilobite plus
US $95.00

PERFECT ASAPHIDAE FOSSIL TRILOBITE POSITIVE AND NEGATIVE SPECIMENMOROCCO
US $25.00

Trilobites Lot Flexicalimene Meiki Marocco
US $15.00

Doctor Fossil Appreciation Novelty Diploma Trilobite
US $9.95

5 Trilobite Fossil In Matrix Prepared Beautiful Paperweight Display Rock
US $8.25

very tiny enrolled Trilobite from Texas Pennsylvanian period
US $45.00

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Trilobite Fossils For Sale

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Ammonite Fossils

Fossils for Sale — Mon, 09 Feb 2009 11:44:50 +0000

The fossil ammonite is the classic fossil-what the man in the street thinks of when asked what fossil looks like. ammonites lived in the seas for about 140 million years, becoming extinct approximately 65 million years ago, about the same time as the dinosaurs at the end of the Cretaceous period. They first appeared during the Carboniferous period approximately 208,000,000 years ago becoming very abundant in the prehistoric seas. Ammonites belong to the group of creatures known as cephalopods, a group of creatures that today includes the ammonites closest living relatives such as the cuttlefish, octopus and squid. The only living creature that gives us a close approximation to the ammonite is the Nautilus which has very similar spiral shell structure.

The majority of ammonites have the characteristic coiled shell that is internally split into a number of small chambers. The ammonite itself lived in one of these chambers and when it grew too large for its current living chamber it formed a new one adjacent to the existing living chamber and then moved into it. This constant adding of chambers gives rise to the characteristic spiral shape of ammonites. The empty chambers were filled with gas and use to provide buoyancy in the ocean. Ammonites range in size from the quite small to the very large with large specimens commonly having shells of a metre across and weighing perhaps 100 kg. The very largest ammonites had shells with a diameter of 2.2 m.

The great thing about ammonites is as they were so prolific in the prehistoric oceans there are many many ammonite fossils to be found now. Indeed a short walk along the foreshore at Charmouth last summer produced severa,l much to my son's delight! They can also be easily found on the beaches to the west of Lyme Regis. A properly prepared ammonite can be a thing of beauty - have a look at the range shown below to see what is currently available:

12lb Huge Rainbow Spiral Ammonite Fossil Specimen b9370
US $99.99

Goniotite Ammonite Morocco Devonian 360 M Yrs Large Fossil
US $23.69

Ammonite Fossil Crystal Cut In HalfMadagascar e0380
US $7.00

Africa Ammonite Fossil Crystal Cut In Half f0328
US $7.00

40mm Beautiful Africa Ammonite Fossil ammd9ie0153
US $15.00

Baculite Baculites sp Ammonite Fossils South Dakota Lot 1 Sutures
US $7.00

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Ammonite Fossils

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Fish Fossils

Fossils for Sale — Mon, 09 Feb 2009 11:16:26 +0000

Fish fossils are amongst the most popular fossils to collect. Ranging from pieces of the larger fish bones such as vertebrae, to complete skeletons or a ghostly outline of a fish in the rock, they are perennially popular with collectors and the curious. With such a wide range of types of fish fossil available, there is something for everyone from pocket money prices to the rare and consequently expensive! Have a look what we currently have on offer or come back soon when we are sure to have different items for you to check out.

If you are new to fossil collecting, you might like to check out our fossil buyer's guide to help you in your quest.

Small Green River Fish Fossil Plate 50 Million Years Old
US $6.99

Incredible lot of teeth of carnivorous fish of the Cretaceous
US $1.00

Fossil fish in stone
US $5.00

Fossil fish multiple death plate from Green River Wyoming Eocene
US $125.00

Fossil Fish death plate from Green River Wyoming multiple fish
US $125.00

one rare fossil fish from china
US $31.60

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Fish Fossils

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What are fossils?

Fossils for Sale — Sun, 25 Jan 2009 22:43:21 +0000

Fossils are the preserved remains or traces of animals and occasionally plants from many millions of years ago. Preserved remains of animals that are older than approximately 10,000 years are usually considered to be fossils, though a more strict interpretation would probably require them to be a few million years old. Fossils are found in layers of sedimentary rock and can vary in size from the very very small (such as fossilised bacteria) to the very large such as the skeletons of large animals including dinosaurs. Usually fossils that are found show only a portion of the individual animal that was fossilised. Normally it is only the hard portions of an animals body that are preserved in this way, for example their bones and teeth. Soft tissues tend not to survive and so it is very rare to find any fossil record of them. It's also possible to find fossilised traces of the animal for example footprints or even fossilised faeces - yes you can even get fossilised dinosaur poo!

So how do fossils actually form? There are a number of different processes and different types of fossilisation possible. As an example consider the fossilisation of a shellfish. When the animal dies it will slowly sink to the bottom of the sea and gradually become covered with sand or silt. The animal's body decomposes or is eaten by scavengers. As time passes the shell gets covered by more and more layers of silt gradually becoming deep and deeper under the sea floor. Over a period of many tens of thousands of years the shell gradually undergoes a series of changes. The chemicals in the shell gradually become replaced by minerals (frequently things like calcite, Iron or silica) coming from water that is passing through the shell and layers of silt. This type of fossilisation is called permineralisation. This carries on over many millions of years until eventually it results in the replacement of all of the shell with the minerals. This leaves the fossil with the shape of the original animals shell but now actually entirely composed of rock. Now we have a fossil buried deep in the rock under the seabed.

So how does it eventually come to be found? Over a period of many millions of years geological changes and movements in the Earth's crust result in what was originally the seabed being pushed up until it is no longer the seabed, but new dry land. More geological changes and the further action of the wind and rain (through a process called erosion) eventually lead to the rock bearing the fossil being exposed leaving the fossil ready to be found. The very last stage in its journey back to the light may be with the help of a geologists hammer!

As previously mentioned there are a number of ways an organism can become fossilised. We have already discussed permineralisation where the original soft tissues are replaced with minerals such as silica calcite or iron pyrite. Other ways organisms can become fossilised include carbonisation, unaltered preservation, recrystallisation and authigenic preservation. In unaltered preservation the organism is preserved as it originally was because it is protected for other effects and decomposition in some way. The classic example of this is an insect that becomes trapped in tree sap which over millions of years turns to Amber, preserving the insect in its entirety. Carbonisation (sometimes also called coalification) results in everything but carbon being removed from the organism. Authigenic preservation refers to fossils of molds or casts of organisms that themselves have entirely decomposed leaving just the cast preserved in the rock. These are fossil equivalents of the worm casts that you often find on a sandy beach. Finally recrystallisation describes the process where crystals form inside the structure of the organism. These crystals eventually replace it entirely - leaving just a crystallised copy.

The different types of mineral that replacing the original organisms structure in permineralisation often result in the final fossil having a distinctive appearance. For example in the case of an ammonite when fossilised these can show considerably different appearances depending on the mineral in question. The ammonites you usually find look like the rock they come from but it is also quite common to find pyritised ammonites which show a lovely golden metallic sheen.

Hopefully this is given you an idea of how fossils come to be and what they are. Have a look through the rest of the website or some of our recommended links to find out much more!

Rhynchonellida Brachiopods Ordovicion Geodic Fossils Germany Block
US $4.99

Natural Baltic Amber with Mystery Fossil Insect 15x14x6mm E362
US $11.95

Collection Of Fossils
US $1.56

Arizona Rainbow Petrified Wood Yellow Red
US $4.42

Rare Triassic Keichousaurus Hui Dinosaur Reptile Fossil
US $137.77

Nice fossil of lepidodendron tree bark
US $6.99

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What are fossils?

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