Fossil Ammonites, Fish, Orthoceras,
Trilobites and Other Fossils

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Cost

Item Description

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$150.00

FO500b  This is a very nice and very unique fossilized Ammonite from Madagascar.  The exterior has been ground smooth, polished to show the suture lines, and the interior shaped into a functional bowl.  The Ammonite has pretty brown and tan exterior colors with the highly detailed tan suture lines.  The inside of the Ammonite shows the yellow calcite in the different chambers.  The large specimen measures 8 1/2" x nearly 7 3/8" x 1 3/4" thick and weighs 3 3/4 pounds.  Very nice!! 

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Ammonite Bowl

$30.00 FO501c  Here is a very nice, above average quality South Dakota Belemnite specimen.  The specimen has many, many distinct Belemnite fossils throughout the matrix.  A view of the edge from the back shows the size and shape of the Belemnite fossils.  The specimen measures over 7" wide x nearly 5 5/8" x almost 1 5/8" thick and has been nicely polished on the face.  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.

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 Belemnite

$45.00 FO502c  This is very nice fossilized Coral specimen from Iowa.  The all natural surface has many genetically identical agatized coral polyps.   This very interesting fossil shows great character as shown in pictures linked below.  This unique specimen measures nearly 6" x over 5 1/4" tall x almost 2 7/8" and weighs almost 3 1/2 lbs.  A must have for the fossil collector or an excellent gift for someone!

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Fossil Coral

$30.00 FO503c  Here is something different from the Rock Shed's gift department.  This is a very ornate stand with a very detailed Geisonoceras Fossil.  The Geisonoceras measures 4 1/2" x nearly 3 5/8" wide.  This cool item has a nice Brown Fossil background with many more well defined fossils visible.  The lovely stand measures over 3 7/8" wide x 2" x 6 1/2" tall and is highly polished on the face.   A true work of nature and man.

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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

$140.00 FO504b  This is a very nice, above average quality, medium sized Ammonite set from Madagascar.  Each piece measures nearly 7" x almost 5 7/8" wide x 3/4" thick and has a high polish in the inside.  The outside has been smoothed but not highly polished.  This set has a beautiful Brown color with lighter Gold highlights in the crystallized areas.  A great gift or excellent educational tool.

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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

$120.00 FO505c   This is a very nice fossil specimen of a natural Geisonoceras fossil from Morocco.  This awesome fossil measures nearly 8" x 6 1/2" x nearly 1 3/4" and weighs over 3 3/4 lbs.  The fossil has great detail showing a distinctive zigzag pattern in the sutures that mark the growing of the external shell. The specimen is all natural and not fully removed from the matrix as shown in the linked pictures below.

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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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Geisonoceras

$50.00 FO506c  This is an unique fossilized Baculite specimen from Western South Dakota.  This interesting Baculite fossil with two sections rests on a dark limestone matrix.   It  includes evidence of where other fossils once were and shows great detail on all sides.  This beautiful longer specimen measures nearly 6 1/2" long x almost 1 5/8" x nearly 7/8" thick with the shorter section measuring 2 7/8" long.   Overall, the matrix and specimen measures approximately 6 1/2" x almost 4 1/8" x 3 7/8" tall and weighs nearly 2 3/4 pounds.  The Baculite sections have been reattached to an original type matrix and this is reflected in our price.  A must have for the serious fossil collector.

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This fossil is a member of the Species Baculites compressus which is from the Cretaceous Period some 60 million years ago.  It is from the Upper Pierre Shale Formation of Meade County in South Dakota.

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South Dakota Baculite

$25.00 FO507c   Wow!  Check this new addition to the Rock Shed's gift department.  This is a very nice, above average quality Orthoceras Fossil Dish.  The plate has a nice Geisonoceras fossil and a good variety of interesting fossils throughout the balance. This beauty measures almost 6 3/8" x nearly 5 3/8" wide x 7/8" thick.   This highly polished Fossil dish could be used as a mantle piece or wall hanging as well being functional.  Super cool.           

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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.

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Fossil Dish

$120.00 FO508c  Here is something different from the Fossil department at the Rock Shed.  This is a very nice, high quality, large Trilobite fossil in matrix. This interesting fossil actually shows great detail of the trilobite throughout.  The specimen measures nearly 8 1/4" long x 6 3/8" wide and has a natural, rough-like texture with no polish.  The matrix is both the specimen and the top that together measure nearly 10" x 8 1/2" x approximately 2 1/8" thick and weighs over 8 3/4 pounds.  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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Large Trilobite in Matrix

$18.00 FO510c  This is very nice and quite large fossilized Turtle poop or coprolite specimen from Madagascar.  This unique specimen measures 3 1/4" long x 1 3/4" over 1 3/8" and has an all natural appearance.  This very interesting fossil shows great detail as shown in pictures linked below.  A must have for the serious fossil collector!

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Fossil Turtle Poop

$65.00 FO511c   This fossilized Lobster is from Gunn Point in 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 4" x 2" x 1 3/4".  It would make a great addition to any fossil collection.

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Lobster

$200.00 FO512c    Here is something different from the Rock Shed's fossil department.  This is a very well preserved, above average quality Crinoid specimen.   The Crinoid has several very detailed calyx (flowery head) with pieces of their stems attached.  It measures approximately 12 1/2" x over 10" wide x nearly 3/8" thick, weighs almost 8 pounds and has not been polished.  Since this was once part of an ancient sea floor other fossils can be seen from when the specimen was cut and prepared for display.  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.

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Crinoid

$50.00 FO513c  Here is a very nice, above average quality Ammonite specimen from Germany.  The detailed specimen measures 2" wide x 1 3/4" and is in it's all natural state.  A view of the exterior shows evidence of a shell in the matrix rock. Overall, the fossil is nearly 4" x almost 3 1/4" x nearly 2 5/8".  A very nice unique fossil for your 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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 Ammonite

$12.00 FO514b  This is a nice fossil shark's tooth in matrix.  Its specie name is Otodus Obliquus; also known as a Sand Shark and is from the Eocene period.  The shark tooth is in matrix and measures nearly 1 7/8" long diagonally x 1 1/4" wide and is from Madagascar.  The total specimen measures nearly 3 3/4" x 3 1/8" x 1 3/4" thick.

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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

$180.00 FO530b  This is a complete and very nice quality fossil Shark Tooth from the Megalodon Shark.  This excellent specimen measures over 4 1/2" diagonally x 3 1/2" wide x nearly 1" thick.  The Shark Tooth has grayish colored enamel and more of dark brown colored root lobe.  This is a very neat fossil specimen for any collection.

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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

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