Partial, Fossil Trilobite and Horn Coral Association - New York

This is a 3.4" wide piece of shale that contains two partial trilobites and a horn coral fossil. This specimen was collected from the Windom Shale of New York. Comes with an acrylic display stand.

Trilobites were a very diverse group of extinct marine arthropods. They first appeared in the fossil record in the Early Cambrian (521 million years ago) and went extinct during the Permian mass extinction (250 million years ago). They were one of the most successful of the early animals on our planet with over 25k currently described species, filling nearly every evolutionary niche. Due in large part to a hard exoskeleton (shell), they left an excellent fossil record.

Horn coral or Rugose coral first appeared in the geological record 488 million years ago and went extinct during the great Permian extinction 251 million years ago. They get their name from the hornlike structures built by the coral animal. They are very often used as an index fossil to help correlate the geological age of different formations.
Eldredgeops rana rana (Trilobites) & Stereolasma rectum (Coral)
Hamburg, NY
Windom Shale
3.4 x 2.1" shale
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