Fossil Ammonites, Fish, Orthoceras,
Trilobites and Other Fossils

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Cost

Item Description

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$13.00

FO100b  This is a Fossil Collection Kit with 12 different specimens. They include, Gastropod, 2 kinds of trilobites, Crinoid stem, Pelecypod, Brachiopod, horn Coral, shark teeth, Ammonite, petrified wood, dinosaur bone and fossil Algae.  Each of these items comes with its own detailed write up. A great gift for kids or to add to your own collection.

fossil collection kit

Fossil Collection Kit

$250.00

FO103c   Here is a medium sized, above average quality Crinoid fossil.  It measures almost 8 1/4" wide x nearly 10 3/4" tall x almost 1" thick and has not been polished.  The Crinoid has a very detailed calyx (flowery head) and stem.  Since this was once part of an ancient sea floor other smaller crinoid stems can be seen on the left side of the specimen. Very nice!

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Crinoids, also known as sea lilies or feather stars, are marine animals that belong to a class of Echinoderms.  They lived in both shallow and deep water.  They are characterized by a mouth on the top surface that is surrounded by feeding arms.  Crinoids usually have a stem used to attach themselves to a substrate, but many live attached only as juveniles and become free-swimming as adults. There are only a few hundred known modern forms, but crinoids were much more numerous both in species and numbers in the past. Some thick Limestone beds dating to the mid- to late-Paleozoic are entirely made up of disarticulated crinoid fragments.

crinoid

Crinoid

$210.00

FO116b   Here is a large, above average quality, colorful Ammonite set.  Each piece measures over 7 3/4" x nearly 6 5/8" x 7/8" thick and has a nice polish on both sides.  The set has a highly detailed interior with some nice crystallized cavities.  This beautiful fossil is from Madagascar.  Very, 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.

ammonite

Ammonite

$18.00

FO109c  This is a neat find!!  Here is a nice quality fossilized Sand Dollar from Madagascar.  It measures 2 7/8" in diameter x almost 7/8" thick and has been nicely polished on the top surface to bring out the detail allowing for a great display. 

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This species of Sand Dollar is "Clypeasteroida" They are very beautiful specimens and have nice detail.  They are from Majanga, Madagascar and lived in the Jurassic period some 146 to 200 million years ago.

sand dollar

Sand Dollar

$65.00

FO112c   Here are three Fossil Knightia Fish from the Eocene Age from the Green River Formation, Lincoln County, Wyoming.  These very detailed fossil fish specimens are in light colored Limestone matrix measuring 5 1/2" tall x nearly 8" wide x over 3/8" thick.  The longest fossil itself measures nearly 3 5/8" from head to tail with the shortest one 2 7/8" long.  These 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

Knightia

$50.00

FO105c  This is a unique item featuring two fossilized Trilobites from Morocco.  This larger trilobite in this specimen measures over 1 1/4" x 3/4". The smaller one is nearly 7/8" x almost 3/4" and on matrix that is 7 1/2" x 8 1/2" x nearly 2 1/4" including the Trilobite.  This interesting fossil has great detail of the trilobite throughout.  A must have for the fossil collector or an excellent gift for someone!

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trilobite

Trilobite

$75.00

FO106b  Here is a very unique dish craved from Orthoceras fossils in matrix from Morocco.  This platter has several very nice Orthoceras carved out in a very neat design. The dish measures over 10"long x 6 7/8"wide x almost 2" weighing just over 7 pounds and has a nice polish. 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

Fossil Dish

$60.00

FO114c  This is a very nice, above average quality complete Nautiloid Fossil from Madagascar.  It measures almost 4" x 2 7/8" x 2 1/2" and has a nice polish on the outside bringing out the the excellent quality of this specimen.  A great addition to any 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.

fossil

Nautiloid

$50.00

FO104b  Here is something really cool and different for the Fossil collector.  This is a beautiful fossilized Ammonite from Western South Dakota.  One Ammonite is perched on top of the matrix and measures nearly 2 3/8" x 2 1/8" x nearly 3/8". The matrix has many other fossils and evidence where others were.  Together in the matrix, the specimen measure approximately 3 1/2" x almost 2 3/4" x over 3 1/4" and weighs nearly 1 1/4 pounds.  This outstanding piece makes an excellent display item!

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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.

fossil ammonite

South Dakota Ammonite

$30.00 FO101c  Here are many very nice, above average quality, Orthoceras fossil specimens cut into a free form plaque.  The plaque measures 6 3/4" wide x over 8" tall x almost 1 3/4" thick.  The fossils on the front face have been chipped out of the matrix and polished to reveal very good detail and unique characteristics.  They range from 4 1/2" to 7 1/4" long.

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fossil plaque

Orthoceras

$13.00

FO111b  Here is something different for the fossil collector.  This is a very nice, above average quality Petoskey stone specimen from Madagascar.  The fossil measures nearly 2 1/2" x almost 2 1/8" x 1 1/4" and is nicely polished.  The fossilized coral has nice detail and a good appearance.  A very nice addition to your fossil collection.

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Petoskey stones are composed of fossilized coral, Hexagonaria percarintata, deposited in the Devonian period, some 350 million years ago. Most notable among the many places worldwide Petoskey stones are found is in the Gravel Point Formation of the Traverse Group in the northwestern portion of Michigan's lower peninsula. Similar fossilized coral stones are found in other world-wide locations including Madagascar.

petoskey stone

Petoskey Stone

$50.00

FO115b  Here is something different for the Fossil collector.  This is a nice fossilized end of Coprolite, also known as "Dino Dung".  It measures 6 1/2" x 4" x  2 1/2" and has been polished on the front face.  This specimen has a nice blend of color and a good design that resembles Petrified Wood.  Take it home with you today.

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fossil corprolite

Coprolite

$35.00

FO107c  Here is a very unique shaped dish carved from Fossil Rock from Morocco.  This dish has a nice Orthoceras fossil and very cool design with lots of visible fossils on the balance of the dish.  It measures over 6 3/4" x nearly 5 1/2" x almost 1 1/4" thick with a lovely polish.  This would make a great gift or keep it for yourself!

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fossil

Fossil Dish

$14.00

FO102c  This is a new and different item at the Rock Shed; a Turritella Agate slab cut from material from south central Wyoming.  The slab has a soft Grayish Brown color and has many, many nice fossils scattered throughout. This specimen measures nearly 5 1/2" x 2 1/8" x 1" thick and has a nice polish on one side.  It was cut and polished here at the Rock Shed's own Lapidary department.  A nice item for any fossil collection.

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Turritella Agate is composed of silicified fossil shells in various matrix composed of soft sandstone to a dense chalcedony. Some of the Turritella are actually shells of the freshwater gastropod, Elimia tenera.  These fossils are considered to be from the Eocene Epoch to the Cretaceous period in age.

turritella agate

Turritella Agate

$125.00 FO110c   Here is something different from the Fossil department at the Rock Shed.  This is a very good, high quality large Trilobite fossil in matrix. This interesting fossil actually shows great detail of the trilobite throughout.  The specimen measures 7 1/8" x 4 1/2"and rests is matrix measuring over 9 3/4" x nearly 6 5/8" x almost 2 1/8" with two halves together. The fossil has a natural, rough-like texture with no polish.  Close observation may reveal some detail areas have been professionally prepared but it doesn't detract from the display of this awesome fossil.

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lg trilobite

Large Trilobite in Matrix

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