Ammonite Death Assemblage with Four Species from Nevada

Ammonites: Frechites nevadanus, Parafrechites meeki, Paraceratites vogdesi, Nevadites furlongi

Phylum Mollusca, Class Cephalopoda, Subclass Ammonoidea, Order Ammonitida

Geological Time: Triassic

Size (25.4mm=1 inch): Matrix 4 1/4" X 6 3/4" (110mm X 170mm) F. nevadanus 1 1/16" "A" , Largest P. meeki 1 1/4" "B" , P. vogdesi 2" ( 51mm) "C" , N. furlongi 13/16" (21mm) "D"

Fossil Site: Favrett Formation, Pershing County, Nevada

These Triassic ammonites coming from Nevada likely swam the seas with the first Ichthyosaurs (large sea going reptiles that looked like dolphins), for which they were probably a major food source. This was also a time when the various continents of moderns times comprised a single landmass called Pangaea.

This particular plate contained four different species. They are found in a very hard limestone and are very difficult to prepare, which is why they are rarely seen on the market.

Also see: Ammonite Fossils

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