Rare Glass Sponge

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Glass sponges are one of the rarest Devonian-aged fossils in Central New York. 

The Devonian Period (400 - 359 million years ago) introduced the earliest amphibians, sharks, and ammonites. During this period, New York State was underwater and located near the equator, producing a tropical climate. Glass sponges lived in the shallow ocean that covered Central New York. Sponges are marine animals with a simple, yet delicate structure. Because sponges are so delicate their fossils are also rare because they were often crushed by layers of sediment. 


Glass Sponge
Uphantaenia chemungensis
Upper Devonian
Chemung Facies Siltstone
Tompkins County, New York 


Size: 2.75 x 1 x .25 inches

Weight: .45 oz.