Fossil Ammonites, Fish, Orthoceras,
Trilobites and Other Fossils

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$25.00 FO400c   Here is an above average quality, colorful Ammonite half.  It measures 5 3/8" x almost 4 3/8" wide x nearly 5/8" thick. The specimen has a nice polish on the inside with some iridescence on the equally nicely polished outside.  The Ammonite has a highly detailed interior with some nicely crystallized partitions.  A super fossil!!

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Click here for more like this.!!!

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

$45.00 FO401c  This is a smaller Ammonite fossil resting in a bed of Grey Shale matrix.   The Ammonite measures 2" x 2 1/4" and the matrix measures 4" x 4 1/2" x 1 3/8".  Close observation will reveal several smaller and/or partial other fossils in the matrix.  This would make a great gift or exceptional educational too.

Ammonites lived in the Cretaceous period some 63 to 130 million years ago.  Great for any collection.  Each set is a one of a kind and cannot be duplicated.

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Ammonite

$50.00 FO402c  This is a very nice, high quality fossilized Starfish in matrix from Morocco.  The large Starfish measures 2 1/4" x 1 7/8" in a fossilized matrix measuring 5 1/2" x nearly 5 1/8" x almost 7/8" thick.   This is a Starfish from the Ordovician Period some 450 to 510 million years ago and was found in the Atlas Mountain region of Sahara Desert.  Very nice!

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Starfish Fossil

$16.00 FO403b   This is a very nice larger fossilized Coral specimen from Indonesia.  This unique specimen measures approximately 6 3/4" x 4 5/8" x 3 3/4" thick and weighs nearly 3 3/4 lbs.  This very interesting fossil shows great character as shown in pictures linked below.  A must have for the fossil collector or an excellent gift for someone!

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Fossil Coral

$60.00 FO404c   Here is a nice, high quality Green River Fossil still entombed the matrix shale.  Which actual fossil remains undetermined until you carefully expose it.  It is estimated you will spend from 15 to 35 hours to gently remove the shale to expose the fossil.  The fossil looks like it will measure approximately 3 3/4" x over 2 1/2" and is in matrix that is 10 3/4" x nearly 9" x over 3/8" thick.  The fossil comes with a tool and information sheet containing fossil exposure instructions and tips.  These fossils make great gifts or work wonderful as an educational tool for school, scouts or clubs. 

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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.

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Green River Fossil

$85.00 FO405b  This is a very nice fossil specimen of Orthoceras fossils from Morocco on a medium sized matrix plaque.  The detailed Orthoceras fossils were carefully exposed from the rock surrounding them.  The all natural and unpolished plaque measures 9 3/8" x over 6 3/4" x almost 2" and weighs nearly 4 1/4 lbs.  The fossils on this fossil plaque are as described below and are from Morocco.

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These Moroccan fossils are among the oldest cephalopods.  They were abundant during the Paleozoic era some 350 MM years ago and now make up the Atlas Mountain range of central Morocco. There were two Nautiloid forms present in the Moroccan Devonian sea.  The Goniatites is an extinct relative of the Ammonites,  it possessed an external shell, which is has a spiral form with internal chambers. The Orthoceras was straight shelled cephalopod with the internal chambers. They were related to the modern day chambered nautilus and the squid.

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Orthoceras Plaque

$20.00 FO406c  This is a fossilized Trilobite in matrix from Morocco.  The very detailed Trilobite specimen measures over 2 1/8" long x over 1 1/4" wide.  The specimen is in matrix that is nearly 2 3/4" x almost 2" x 2 1/8".  A very cool fossil for you to enjoy.

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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 FO407c   This is a Calymene Celebra Trilobite of the Phacopida group in matrix from Illinois.  The detailed Trilobite measures nearly 1 1/4" long x almost 7/8" wide.  The specimen measures nearly 1 5/8" x almost 1 5/8" x nearly 1 3/8" and has not been polished.  This Trilobite species from the Devonian period is the state fossil of Wisconsin as it's found there and in the neighboring states of Illinois and Indiana. 

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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

$85.00 FO408b   This is a very nice fossilized Ammonite collage from the Jurassic (Mesozoic era) period about 172 million years ago.  This are Ammonite species Dactylioceras in country rock from Schlaifhausen, Germany.  The excellent specimen has many, many detailed Ammonites in various sizes scattered throughout measuring from 1/2" to nearly 1 7/8".  The Ammonites and the matrix together measure almost 6 1/2" x nearly 5 1/2" x almost 1 1/2" thick.  Very cool!

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German Dactylioceras

$65.00 FO409c   Here is an very interesting Ammonite Fossil from Morocco.  The exterior has been smoothed and polished to show the detail  of the suture lines of the of the shell. It measures nearly 4 3/4" x over 3 3/4" x 1 1/8".  A nice fossil for any fossil collector.

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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.

ammonite

Ammonite

$70.00 FO410b  Here is a fossilized Spinosaurus Tooth from Morocco in North Africa.  This particular fossil tooth measures 2 1/2" x 3 1/2" in a matrix that is over 5 3/4"  x 5 3/8" x almost 2 1/2" and has a natural unpolished surface.  The fossil is complete and has good detail and color.  A great educational tool or very cool keepsake.

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Spinosaurus may have been the largest of the theropod dinosaurs, even larger than a Tyrannosauras.  Spinosaurus were first discovered in Egypt in 1912.  They are know to have eaten fish and likely lived on both land and in the water like a crocodile.  They had large spines emerging from their back forming a large sail like structure.  They lived in the Cretaceous period some 112 to 97 million years ago.

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Spinosaurus Tooth

$60.00 FO411b  This is a larger, above average quality specimen of Petrified Wood Slab from Madagascar.  It has been highly polished on both sides and measures 9 1/8" wide x almost 8 3/8" x 3/8" thick.  The Petrified Wood has a nice blend of Reds and Earth tone colors, a small crystal cavity that goes all the way through and lots of character.  It has a very different, irregular shape and very nice design. 

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Petrified Wood is a type of a fossil as it consists of fossil wood where all the organic materials have been replaced with minerals while retaining the original structure of the wood.  These minerals are most often Silicates such as Quartz.  Other minerals, Manganese, Iron and Copper, in the water or mud during the petrification process give Petrified Wood a variety of color ranges: black - Carbon; green/blue - Copper; red/brown/yellow - Iron.  Petrified Wood can preserve the original structure of the wood in all its detail all the way down to the microscopic level.  Structures such as tree rings and the various tissues are often observed features.  Although Petrified Wood can be found worldwide, it is rather rare in larger quantities and at times can be difficult to obtain by the average collector.

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Petrified Wood

$45.00 FO412b  This is a very nice group of 14 Sand Shark's Tooth Fossils in matrix from Morocco.  The shark's teeth are all approximately 1 1/4" to 1 1/2" wide x 1 1/4" to 1 1/2" long.  The large specimen of Shark's teeth measures 9" x nearly 9" x 4 1 /4" thick and weighs 14 3/4 pounds.   These shark's teeth are found in a light colored Limestone and from the Eocene period.   This interesting specimen has a few dings on it but is still very nice!

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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 Teeth

$110.00 FO413b   Here is something different for the fossil collector.  This is a larger, above average quality, fossilized Trilobite from Morocco. The species is Phacops from 430 to 360 million years ago.  The Trilobite measures 4 3/8" long x 2 3/4" wide.  The matrix overall measures approximately 4 5/8" x almost 4 1/8" x nearly 2 3/4".  Close inspection does show some minor repairs and is reflected in our price. A very nice fossil.

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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.

trilobite

Trilobite

$225.00 FO420c   Here is something different from the Rock Shed's Fossil department.  This is an exceptionally nice Fossil Leaf specimen that we believe is from the Hell Creek Formation in Montana. This very cool specimen has at least eight leaves of three different trees. The one at the top center left in the picture to the right appears to be from a Dawn Redwood (Metasequoia) and measures 2" long x 3/4" wide. The others look to be from Willow and Poplar like trees and possibly Sumac.  We found another neat fossil on the back of this specimen; what appears to be a Mosquito type insect. This extremely nice fossil specimen is in a light colored limestone matrix measuring approximately 17 1/2" wide x 11 3/4" x almost 1 1/4" thick and weighs over 12 1/2 pounds.  A very, very nice fossil!

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Fossil Leaves

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