Fossil Ammonites, Fish, Orthoceras,
Trilobites and Other Fossils

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Item Description

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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.

Diplomystus Fish

$8.00

Dinosaur Kit

     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.

 Knightia Fish

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Baculites are a genus of an extinct marine animal that are a nearly straight shelled type of Ammonite that lived worldwide throughout the late Cretaceous period.  They could grow up to 2 meters long and were though to have lived in a vertical orientation with the head hanging straight down. 

Baculite

FO207b  This fossil Crab is from Gunn Point in Darwin of the Northern Territory, Australia.  It was formed after the area was catastrophically buried in an intense cyclone with mangrove trees in calcium rich mud.  This particular specimen, although not complete is well preserved and measures 1" x 1 1/2" and is not polished.  It would make a great addition to any fossil collection.

Crab

FO201b  This is very nice fossilized Coral specimen from Indonesia.  This unique specimen measures approximately 5 1/2" x nearly 5 3/4" x almost 1 3/4" thick.  This very interesting fossil was cut and highly polished on the face to show the internal detail as well.  A must have for the fossil collector or an excellent gift for someone!

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Fossil Coral

FO204c   This is a very good find! This is Fossilized Clams from Florida.   The specimen has two larger clam shell halves and one smaller portion of another shell. The larger clam shell measures 4 1/2" x 3 1/2".  This large fossil specimen is in matrix measuring nearly 8 1/2" x almost 5 1/2"x over 2 3/8". Very nice indeed!

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Fossil Clams

FO200c  This is a Fossil Fish Knightia from the Eocene Age from the Green River Formation, Lincoln County, Wyoming.  This fossil fish specimen is in limestone matrix measuring 6 7/8" x 3 3/4"x 5/8".   The fossil itself measures 5 1/4" from head to tail.  This fossil fish lived some 50 million years ago. These fish are found in a light colored Limestone.

     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.

Knightia Fish

FO208b  This is a nice specimen. It is a complete Ammonite from Madagascar cut into two halves. The exterior has been ground smooth and polished to show the suture lines. The Ammonite is a pretty brown color with the detailed tan suture lines. Each side is 4 7/8" x almost 4 1/4" x over 1/2".  Just an excellent item to display in 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.

Ammonite

FO209b  This is a  fossilized Ammonite collage from the Jurassic (Mesozoic era) period about 172 million years ago.  This is species Dactylioceras in country rock from Schlaifhausen, Germany.  The specimen has many Ammonites in various sizes scattered throughout measuring from 1/2" to nearly 2 1/2" and the matrix measures 5 1/2" x 3 1/2" x 2 3/8". Very cool!

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Ammonite

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Geisonoceras

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

Orthoceras