Lower Ordovician Palmetto Formation

Esmeralda County, Nevada

Latex cast of a graptolite (top) and the original specimen from which the latex cast was made (residing on its shale matrix) from the Lower to Middle Ordovician Palmetto Formation, Esmeralda County, Nevada; note that the latex cast has produced a three dimensional life-like reconstruction of the specimen. Called scientifically Orthograptus calcaratus. Photograph courtesy a specific scientific publication.

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