Fossil Ammonites, Fish, Orthoceras,
Trilobites and Other Fossils

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Item Description

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$85.00 FO700c   This is a different item at the Rock Shed, a larger Geisonoceras Fossil from Morocco. This item has a nicely detailed Geisonoceras fossil measuring 6 7/8" x over 5 3/8".  Overall, it measures approximately nearly 9 1/8" tall x 6 3/8" wide x almost 3 3/4", weighs under 5 1/4 lbs and has a soft Gray and Brown background color.  This fossil on this stand shows evidence of being professionally repaired, fairly common for this item and reflected in our price.  A lovely item for any fossil collection.

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Orthoceras was a marine cephalopod, this particular species was straight shelled and they thrived some 400+ million years ago in the Paleozoic era. 

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Geisonoceras Stand

$50.00 FO701b   Here is a very nice, complete Geisonoceras fossil.  It measures 4 3/4" x 3 3/4" x almost 1 3/8" thick and is not polished.  It has intricate detail with distinctive zigzag suture lines and a good color blend of Tan, Browns, Gray and White.  There is an obvious crack where the fossil was glued back together and some small fill areas but still a very nice example and a definite keeper for the fossil collector. 

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geisonoceras

Geisonoceras

$25.00 FO702c  This is a nice Orthoceras Stand up.  It has several Orthoceras fossils exposed from the matrix and polished to show the detail and beauty of each fossil.  The longest Orthoceras fossil is over 10" long.  The piece itself is nearly 13" tall x almost 4 1/8" wide x over 4 1/8" and weighs over 6 1/4 pounds.  It makes an excellent display item or wonderful unique gift!

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Orthoceras was a marine cephalopod, this particular species was straight shelled and they thrived some 400+ million years ago in the Paleozoic era.  Orthoceras is a genus of extinct Nautiloid Cephalopod.  These fossils are common and have a global distribution which occur in any marine rock, especially Limestone.  These are slender, elongated shells with the middle of the body chamber transversely constricted and a sub-central orthochoanitic siphuncle.  The surface is ornamented by a network of fine lirae or fine lines/ridges.

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Orthoceras Stand

$45.00 FO703b  Here is something different for the fossil collector.  This is a very nice pyritized Ammonite from Buttenheim, Germany.  This Pleuroceras ammonite fossil has both sides of the ammonite naturally replaced by Pyrite. You can feel the weight of the Pyrite by the heaviness for it's size.  The Ammonite is from the Juassic period, Plensbachian stage, about 185 million years old.  The Ammonite measures almost 1 3/4" x nearly 1 1/2" x almost 3/4" thick overall .  A very nice addition to your fossil collection.

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Ammonites are extinct members of the cephalopod group of mollusks. Only a limited number of species have survived to the present day which includes the squid and the chambered nautilus. Ammonites had a multi-chambered shell, and added more chambers as it grew, always living in the outer chamber.  They lived in the Cretaceous period some 63 to 130 million years ago.

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Pyrite Ammonite

$12.00 FO704c  Here is something different for the fossil collector.  This is a very nice, above average quality Devonian Colonial Coral specimen.  The fossil measures 2 3/8" x almost 2 1/8" x nearly 7/8".  The fossil Coral has nice detail and a good appearance.  A very nice addition to your fossil collection.

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Coral

$25.00 FO705b This is a very nice Fossil Fish Diplomystus dentatus from the Eocene Age from the Green River Formation, Lincoln County, Wyoming. This nice fossil fish specimen is in a tan colored limestone matrix measuring 6 1/2" x nearly 4 3/4" x over 3/4" thick.  The very detailed fossil itself measures almost 5 1/8" from head to tail x 1 1/2". This fossil fish lived some 50 million years ago.

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    In southwest Wyoming (and parts of Colorado and Utah) in the Green River Formation are found some of the world's most outstanding specimens of fossil fish.  The Green River system was composed of three lakes:  Lake Ulinta, Lake Gosiute and Fossil Lake.  These Eocene Lakes lay in a series of intermountain basins formed by geological events that uplifted the Rocky Mountains during the early Tertiary time.
The Climate was much different from the desert-like climate of this area today.  Both the fauna (crocodiles, alligators, boa constrictors and some subtropical fish families) and the flora (such as large palm trees) indicate a climate much like that found along the Gulf Coast today.  Large amounts of ash found in the sediments indicate that volcanoes were particularly active at this time.
    
The fossils found in the Green River Formation are between 40-60 Million years old and are in excellent preservation.  The most common fish found in the formation is the Knightia, a herring-like fish.  They are found singularly or in large groupings. These groupings are referred to as "Mortality Layers" and are believed to have been caused by extensive ash fall-out after volcanic eruptions. Some of the other species of fish found in the Green River Formation are:  Phareodus, a carnivorous fish often found up to 2 feet in length and having many sharp teeth.  Mioplosus, a true perch, and Priscacara, a sunfish-like fish with stout dorsal and anal spines.  There are also turtles, stingrays, crocodiles and alligator gar-fish.
The fossils of the Green River Formation - each one unique - are some of nature's finest art. They are highly valued by collectors the world over.

fossil fish

Fossil Fish  

$40.00

FO706c  This is a very nice, high quality Trilobite fossil in matrix.  This interesting fossil actually shows great detail of the trilobite throughout.  The specimen measures over 2 1/2" x 1 7/8" wide and has a natural, rough-like texture with no polish.  The matrix and trilobite together measure 4" x nearly 4 1/4" x almost 3/4" thick. Very nice!

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Trilobites are hard-shelled, segmented members of Arthropoda and the class Trilobita that existed throughout almost all of the Paleozoic era, flourishing in the earlier part of it and slowly declining in the later part. The most common trilobites were about 2-7 cm (1-3.5 in) in length, but over their long history they ranged in size from 1 mm-72 cm (.04 in-28 in) and exhibited so much variation that they are classified into nine (or possibly ten) orders with more than 15,000 species. The smallest species are presumed to have been part of the free floating plankton, while the more common, mid-sized species probably walked along the sea floor filtering mud to obtain food, and the larger varieties may have been swimming predators.

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Trilobite

$24.00 FO707b  Here is something different for the fossil collector.  This is a very nice set of 3 Orthoceras Fossil Free Forms with several nice polished specimens.  The specimens measure approximately 5" to 6" in length and 1 1/2" to 1 3/4" in width.  The fossils have a smooth, polished finish and have not been chipped out of the matrix like the Orthoceras plaques we sell.  These fossils are from Morocco.  They make great decorator pieces as well as collectible for the fossil collection.

Note:  The fossils we send will  be similar to the picture since the ones we have in stock are all very near the same size and each looks very similar to the picture (all have good detail and are nice). You will receive three (3) fossils.

Orthoceras was a marine cephalopod, this particular species was straight shelled and they thrived some 400+ million years ago in the Paleozoic era. 

orthoceras

Orthoceras

$40.00 FO708c  This is fossilized Lobster from Gunn Point, Darwin, Northern Territory, Australia. It was formed after the area was catastrophically buried by an intense cyclone, with Mangrove trees in Calcium rich mud. This particular specimen, although not complete, is well preserved and measures 3 1/2" x nearly 1 5/8" x 1 1/2".  It would make a great addition to any fossil collection.

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Lobster

$180.00 FO709b   Here is an exceptionally nice specimen of a fossilized Megalodon shark tooth.  The remarkable tooth has very nice serrations and measures 4 3/4" at the longest diagonally x almost 3 1/2" wide x over 7/8" thick.   This awesome tooth would make a great gift for the fossil collector or a super educational tool for any teacher, scout leader or science center.

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This tooth is from the largest shark ever known to live.  The Carcharocles Megalodon sometimes ranged in size up to 60' in length and weighed over 52 tons.  This huge monster is the largest predatory fish that ever lived, second only in size to the sperm whale.  Fossil teeth have been found that exceed 7 inches in length.  These sharks lived in the Miocene period some 23 million years ago to the Mid Pliocene times, 3.6 million years ago.  This specimen is from South Carolina.  

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Shark Tooth 

$24.00 FO710c   This is a nice Shark Tooth Fossil in matrix from Morocco.  The specie name is Otodus Obliquus and it is from the Eocene period.  This Shark's tooth with two visible side cusps measures 2" diagonally x almost 1 3/8" wide and is in matrix measuring 4 3/4" x almost 4 1/8" x nearly 1 3/8". 

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Sand Shark or Otodus obliquus (the Great Grandfather of the Megalodon) is one of the earliest mackerel sharks. These teeth are noted for their wide triangular crown and large side cusps (occasionally multiple side cusps). The Otodus obliquus was the king of the early Eocene, approximately 50-55 million years ago. These large teeth are very showy, making them a must have for every fossil shark teeth collection. Large Otodus obliquus teeth are not easily located in the phosphate pits in Atlas Mountains of Morocco, but can still be affordable. 

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Sand Shark Tooth   

$12.00 FO711b   Here is a very nice fossil Sand Shark tooth in matrix from Morocco. The species name is Otodus Obliquus and it is from the Eocene period.  The shark tooth measures 1 3/4" diagonally x over 1 1/8" wide and rests in a matrix that measures 3 7/8" x 3 5/8" x 1 3/4" overall. 

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Sand Shark or Otodus obliquus (the Great Grandfather of the Megalodon) is one of the earliest mackerel sharks. These teeth are noted for their wide triangular crown and large side cusps (occasionally multiple side cusps). The Otodus obliquus was the king of the early Eocene, approximately 50-55 million years ago. These large teeth are very showy, making them a must have for every fossil shark teeth collection. Large Otodus obliquus teeth are not easily located in the phosphate pits in Atlas Mountains of Morocco, but can still be affordable. 

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Shark Tooth

$300.00 FO712c  This is very nice larger fossilized Ammonite specimen from near Wasta, South Dakota along the Cheyenne River.  This unique specimen measures approximately 6 1/4" x nearly 4 1/2" x over 4 3/4" thick and weighs over 5 3/4 lbs.  The large Ammonite measures 3 3/4" x over 3" x 2 3/4" and the smaller is 2 5/8" x 2 3/8" x over 1". This very interesting fossil has evidence of other fossils in the matrix and great detail as shown in pictures linked below.  A must have for the fossil collector or an excellent gift for someone!

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 Fossil Ammonites

$75.00 FO713c  This is something special for a serious fossil collector.  This is a nice quality fossil Starfish from the Ordovician or some 450 million years ago.  The species of the starfish is Ophiura, otherwise known as Brittle Star and is from the Kataoua Formation in Morocco.  The highly detailed fossil measures approximately 4 1/4" x almost 3" in a matrix that is nearly 5 1/2" x over 4 3/4" x 5/8" thick.  The fossil specimen has had some professional repair; mostly evident on the back side.  An outstanding addition to a fossil collection.

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Starfish

$25.00 FO720c  This is a very nice Ammonite Fossil from Madagascar.  This wonderful Ammonite appears to be species Douvilleiceras mammilatum from the Mahajanga Province of Madagascar.  It's from the Upper Cretaceous age or some 110 million years old.  The exterior has been nicely polished to show the details including inside the open end.  The very detailed Ammonite measures 3" x almost 2 3/8" x over 1 1/2".   Just very nice!

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Ammonites are extinct members of the cephalopod group of mollusks. Only a limited number of species have survived to the present day which includes the squid and the chambered nautilus. Ammonites had a multi-chambered shell, and added more chambers as it grew, always living in the outer chamber.  They lived in the Cretaceous period some 63 to 130 million years ago.

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Ammonite   

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