Fossil Ammonites, Fish, Orthoceras,
Trilobites and Other Fossils

page 6

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Item Description

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$26.00 FO609c  This is something different for a fossil collector and a really great find!  Here are very nice fossilized Orthoceras stand up. The larger fossil specimen measures over 4 5/8" x over 3/4" and the curved one is 4" x nearly 5/8". The stand overall is over 6 1/2" tall x almost 6" wide x nearly 2 1/2".  A unique and great addition to any fossil collection.

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

fossil

Orthoceras Stand

$30.00 FO608c  Here is a very nicely polished Ammonite from Madagascar.  The specimen measures almost 4 1/2" x 3 5/8" x nearly 1" and has a nice polish on the both sides. The larger Ammonite has a nice Yellow color accented by a deep Brown with the nicely detailed tan suture lines.

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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

$15.00 FO603c  Here is a very nice, above average quality South Dakota Belemnite specimen.  It measures 4 3/8" x nearly 2 5/8" x almost 1 1/4" and has not been polished.  The specimen has several very distinct Belemnite fossils throughout the matrix.  A very nice starter fossil or just add it to your collection.

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Belemnites or Belemnoids are an extinct group of marine Cephalopod which are very similar to the modern Squid and closely related to the modern Cuttlefish.  The possess an ink sac, but unlike the Squid, they have ten arms of equal length and no tentacles.

bellemite

Belemnite

$65.00 FO605c   This is a very nice fossil Trilobite from Morocco.  It measures 3 1/8" x 1 1/4" setting in a matrix measuring 4 1/4" x 3 5/8" x 2". The species order is Phacopida. The fossil is from Devonian period and came from the Sahara Desert in the northern part of Africa.  Very nice!

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trilobite

Trilobite

$30.00 FO607b  Here is a very unique dish craved from Orthoceras and Geisonoceras fossils in matrix from Morocco.  This platter has a very nice Geisonoceras carved out in the center with other fossils scattered in the balance of the dish. The dish measures 8 1/2"x 6 1/2" x nearly 1 1/4" and has a nice polish. It has a slight nick in the outer edge that is reflected in our price. This would make a great gift or keep it for yourself!

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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.

fossil dish

Orthoceras Dish

$25.00 FO610c  This is a very nice, high quality Schafite in matrix.  This fossil is from South Dakota.  The large Schafite measures nearly 1 1/2" x 1 1/4" in a fossilized matrix measuring 4 7/8" x 3 1/2" x 2 1/4".  The Schafite has a natural, iridescent, pearl-like finish.  These fossils make great gifts or work wonderful as an educational tool for school, scouts or clubs. Close observation will reveal several other partial to semi-complete fossils throughout the matrix.

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schafite

Schafite

$32.00 FO604b  This is a very nice fossil Trilobite from Morocco. It measures 2 1/4" x 1 3/8" setting in a matrix measuring over 2 3/4" x almost 2 1/2" x nearly 1 1/2". The species is Coltraenia outfatensnsis. The fossil is from Devonian period and came from the Sahara Desert in the northern part of Africa. Very nice!

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trilobite

Trilobite 

$65.00 FO611c  This is a very nice Fossil Fish Diplomystus from the Eocene Age from the Green River Formation, Lincoln County, Wyoming. This fossil fish specimen is in a tan limestone matrix measuring 9 7/8" x 5 3/4"x over 3/4".  The fossil itself measures 5 7/8" from head to tail. This fossil fish lived some 50 million years ago.

  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 Tertiery 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

Diplomystus Fish

$24.00 FO600b  This is a very nice, good quality Schafite in matrix.  This fossil is from South Dakota.  It measures 1 1/2" x 1 1/4" in a fossilized matrix measuring 4" x 4 1/2" x over 2 1/2".  The Schafite has a natural, iridescent, pearl-like finish.  These fossils make great gifts or work wonderful as an educational tool for school, scouts or clubs.  Close observation will reveal many other partial to semi-complete fossils throughout the matrix.

Another photo.

schafite

Schafite

$95.00 FO602b  This is an extra large, above average quality specimen of Petrified Wood Slab from Madagascar.  It has been highly polished on one side and  measures 11" x 11" x 1/2".  The wood has a nice blend of Earth tone colors and has a very different, irregular shape and design. 

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.

petrified wood

Petrified Wood

$50.00 FO601c  Here is something different from the Rock Shed's gift department.  This is a very nice, above average quality Octagon Orthoceras Fossil box.  It measures over 5 1/2" x nearly 2 5/8" tall with the lid and is polished on the top of the lid and the outer sides.  The box has a soft Black color with well defined Orthoceras fossil on the lid, as well as other Orthoceras fossils in the matrix on the bottom.  A true work of nature and man.

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fossil box

Orthoceras Fossil Box

$17.00

FO606b   This is a fossilized Shark Tooth.  The specie name is Otodus Obliquus and from the Eocene period. This Tooth is in a Limestone matrix and measures 2 3/4" diagonally and is from Madagascar.  Close observation would reveal minor damage to the very tip of the tooth, and though it does not take from the appearance, we have reduced the price.

shark tooth

Shark Tooth

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