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.
Chemung Facies Siltstone
Tompkins County, New York
Size: 2.75 x 1 x .25 inches
Weight: .45 oz.